For most of my site work I use Stanley FatMax through tang bevel edge chisels. For an environment where I often abuse chisels they are OK - but being slightly soft they don't hold an edge as well as a "proper" cabinet chisel, however they don't chip as easily as a super hard chisel, either:
being a bit soft they can be rehoned quickly on site and the through tangs with striking caps on top mean that they can be driven with a hammer - not something you should ever do with "good" chisels, for which you really need a wooden mallet (source Crown Tools or Joseph Marples, both in Sheffield). So a chisel which is good for one set of tasks may not be the best for others
The choice of bench chisels actually made in the UK these days is very limited with the last remaining makes being Crown, Robert Sorby, Henry Taylor, Ashley Iles, Stanley (the Sweetheart range, although production has apparently now gone to Brazil, so not sure how good they will be) and Irwin-Marples (now just a brand - the chisels are now made in China and are being sold on their pre-2000 reputation). Of those the fitrst four names are the "premium" brands. There are also some better quality Continental makers still on the market here including Narex (Czech) and 2-Cherries or Kirschen (Wilhelm Schmidt, Germany). There are also some Japanese chisels which some people swear by; I tried a small set of Japanese chisels from Roger's about 40 years ago but found them fussy to maintain and unsuitable for hardwoods like oak (too brittle, chipped too easily and were then a lot more work to sharpen), but excellent on softwoods and mild hardwoods.
If you want something new I recommend you go and have a look at
Workshop Heaven website for bench chisels. They sell the Czech-made
Narex chisels which have garnered quite a good reputation for reasonable quality at a reasonable price in recent years. Workshop Heaven also sells the
Ashley Iles mk.2 cabinetmaker's chisels which are made in the UK and are probably the best bench chisels you can buy today, bar none. I have a part set of those
Ashley Iles chisels as well as quite a few old chisels and the Iles chisels hold an edge as well as any of the traditional chisels I own, with none of the potential flaws you get in old chisels (see below). They are also the thinnest bevel edge chisels made today which makes them a better choice for dovetailing and the like
Apart from avoiding chisels which are worn out, pitted or not flat another of the problems of buying old chisels is that they invariably need regrinding (this is NOT the same as honing them) to form an edge which can then be honed, which without some form of powered grinder (even a hand powered bench grinder) is a drudge task - new chisels come ready ground to the correct angle and generally just need honing (to the secondary bevel angle) and maybe have the backs polished to get you started - so maybe 5 minutes work in all. I feel that for a beginner this is probably a better bet.
There are numerous techniques for sharpening including (but not exclusively) traditional oil stones (Norton, Carborundum) which I started out with years ago, Japanese waterstones, diamond honing plates, "scary sharp", etc. You may find the following video interesting as the guy demonstrates using "scary sharp", which is a cheap way to try things out:
The honing jig he is using looks like an Eclipse#36 (nowadays sold as the
Spear & Jackson 94-360R when it's in stock)
or one of the many "knock off" versions on the market these days, often for under a tenner (although they may require a bit of a touch-up with a file to start with). I've tended to give apprentices one of those as sort of "training wheels" when they start sharpening stuff as they take a lot of the uncertainty out of the sharpening process for a novice.
Whilst I started with a Norton combination stone and a Carborundum stone, and I went through a waterstone phase (fashionable at the time, but wear hollow very quickly and are a lot of work to maintain) before "graduating" to "scary sharp", I have since moved to diamond hones, partly because for site work they are a lot more practical.
My own diamond hones came from
ITS who offer them at sale price several times through the year (maybe worth looking out for if you are in the market) and are 2-sided combi "stones" in 300/600 and 1000/1200 grits. I use them with a refined paraffin honing fluid which doesn't smell as bad as pure paraffin (water, that some people recommend can cause rusting if you don't thoroughly dry and oil the hones at the end of every session). On site I often use either WD-40 or 3-in-1 oil, as available. I went for the biggest ones I could get, 8 x 3in, because I also use them to hone my plane irons which are up to 2-5/8in wide and I find wide irons are a bit awkward to handle on a narrow stone. I am getting a little wary of the cheaper diamond hones as the life span can be very variable and some have thin plastic backings - a diamond hone with a substantial steel backing plate is always a better bet
The whole thing about "keeping an edge" is relative. Get a good chisel sharp when you are working a mild timber like knot-free redwood pine or cherry and you can work for an hour or more without the need to touch up the chisel - but on some really hard oak or birds eye maple you might have to give the chisel a quick touch-up as often as every 6 or 7 strokes. What is true is that little and often is always better than using a chisel or a plane iron until the darned thing is so blunt it won't cut butter.
BTW that is what the whole primary/secondary bevel (sharpen/hone) thing is about - for general use you
sharpen a chisel at about 25° (the
primary bevel then
hone it to about 30° (the
secondary bevel angle), but that secondary bevel only needs to be 1 to 2mm wide to begin with. The idea is that you reduce the amount of time it takes to hone out a cutting edge over doing a single full length 30° bevel. As you hone the chisel during use (to keep it sharp) the secondary bevel will get bigger until you reach the point where you need to regrind the primary bevel. Simple really
I'm in agreement with not going mad and buying a "full" set all at once (a set of Ashley Iles will cost over £200). It's probably better to start out with say 6, 12, 18 and 25mm chisels and add to that as and when you need them. Good chisels don't come cheap, but last a lifetime, so get them a canvass chisel roll and wipe them with an oily rag every time you put them away. In answer to which brand?
Good luck!