Sounds like me........ used the basement remodel as an excuse to buy a framing gun...
That being the case, I couldn't justify more than a couple hundred bucks for a gun that I will use sparingly, especially compared to a professional framer who uses his all day every day. I ended up with a Hitachi gun and dual tank compressor package for $400.
You can buy a gun with adjustable depth control... but I find that the depth of the nail is going to vary a lot depending on how you shoot it, flat shots sink perfectly, angled toenails can be iffy. So, for my purposes the extra bucks for adjustability weren't worth it.
Not an expert, but as I understand it, most framing guns require 70-75psi... and I'd say you'll be happy with any "name brand" for the relatively limited amount of use you'll give it.