If you start doing fencing and exterior you really need guns capable of firing circa 2mm and 3mm shank nails.
The former is a coil nail size, generally available in something like 1.9 to 2.2mm shank x 19 to 64mm, which come with a 2.5 to 3mm full round head. This is incidentally the size you need for laying plywood, etc on floors.
The latter size is probably better sourced as a 2.8 to 3.1mm paper collated clipped head strip nail.in 50 to 90mm lengths (i.e a Passlode type clipped head nail). You can get full head nails, too, but nails are more difficult to source readily
TBH I think that DIYers are better off considering a small compressor and pneumatic nailers for low volumes and intermittent usage. This is partly because all cordless and gas nailers have a maintenance overhead - deWalt 1st fix cordless nailers require replacement springs periodically, compressed nitrogen cordless nailers (e.g. Senco Fusion, Milwaukee etc) need replacement gas cylinders periodically because they leak nitrogen through the seals (replacement is a workshop repair), whilst compressed air cordless nailers such as the Hikoki and Ryobi Air Strike also leak air through hthe seals, but whilst they do need to be recharged periodically that does cost less than regassing the Milwaukee or Senco Fusion guns. Of the three types only the DW is a DIY service fix, for competent spanner twirlers
