For air compressors maximum psi is not as important, as much as being able to hold 9 to 10SCFM @ 100Psi
something like this
http://www.sears.com/sr/javasr...61000
would be to handle most air tools, sanding, and the mother of all air sucking things -> spraying.
Also, do NOT get oil free air compressors, they are loud as f**k and fail far easier than those 2 stage oil lubed ones.
Plan to spend at least $1k for the whole entire setup.