I have a couple air compressors, an older 5 gallon which is noisy and loud as heck. Pretty much just gets run when I need to run one of the nailers alot. And one of these which I picked up on amazon during a sale. About $75 as I recall.
California-Air-Tools-CAT-1P1060S-Compressor on Amazon
It is quiet, lightweight and gets up to pressure fairly quick. I use it for airbrush (with inline filter), light nailer/stapler and occasionally tires when I don't feel like using the foot or hand pump. I really like how portable it is. Has been 100% reliable over the last year or more for me. Did I mention how quiet it is, it really is.
Regards
/Karl