IMO its hard to go wrong buying a FUJI. When I had access to a commercial shop - with a spray booth, nice Sata guns, catalyzed finishing etc. I did not consider buying anything new for my home shop. When I first retired - I had been struggling using a Titan (now part of Wagner) 345 Xi high pressure sprayer pump setup - that is really meant for house painting. I still use it - but more recently bought a Fuji Q4 setup which is much better/easier to control for furniture finishing.
They also sell a smaller system that seems to get good reviews:
Regarding nail guns- there are two kits that I spotted to consider -
These are also available on Amazon for the same price - and both Bostitch and Porter-Cable are part of the Stanley-Black&Decker Family - so thes kits may be very similar.
If you want to buy individually - Hitachi pneumatics are very good - available at Lowes - or online:
You might also take a look at some of the Toolguyd posts on compressors:
In my professional life - for small jobsite compressors - we used Eagle and Emglo, compressors - Bostitch, Grex, Hitachi, Makita,and Paslode nail guns - plus a few oddballs from Cadex, Porta-Nails, Powernailer, Senco, and Tigerclaw. We also used cordless (Paslode Impulse) nailers for punch-list work and for tight spaces (like some bathrooms and powder rooms - where an air hose would have been a nuisance. If buying today - I think I'd be shying away from the Paslode Impulse guns because of the smell and service requirements associated with their use of gaseous fuel cartridges. I now hear some good things about Ryobi cordless nailers: