If you have a garage, you need an upgright air compressor, even if you don't a set of impacts. Just having the freaking AIR is nice. I got a ton of impacts, Snap-On, Mac, etc. that I got cheap. Never even pull them out. Sometimes to yank rims, but that's about it.
I'm waiting for my noisly single stage compressor to die, so I can get a quiet 2 stage compressor. Buddy has one, you can talk over it.
Barry