I was given a compressor recently with no tools so looking at buying stuff. I've noticed all the air tool kits have something you don't need. In the end I forewent the nibbler and got the air chisel/hammer. All I wanted was a ratchet and impact driver. It would of cost me 3 times as much just to buy them on their own as to buy a kit with unneccasary accessories. Go figure.
Must say though it was kinda satisfying air chiselling through a phone book in micro seconds!