I'm in the planning stage of our living room upgrade, which will
continue into the dining room and hallway. I'll be installing; crown
modling and built-in bookself/cabinets for sure. We are also kicking
around the idea of wainscotting. A relative of my is offering me an
20 gal 4 HP air compressor for next to nothing. Now all I need is a
nailer to go with it. For the above job I'm figuring I'll need
something that will be able drive upto a 2-1/2" finish nail.

What are the essential feature for a nailer? I've seen things like;

3/4" to 2-1/2" vs 1-1/4" to 2-1/2" nail size
Depth-of-drive adjuster
ajustable exahust
straight vs angled nailer
oil and oiless
etc.

Are the any nailers to stay away from?

Thanks in advance,
Ed