I went to Rural King Saturday and bought a Porter Cable 60 gallon vertical3HP compressor model C7501 for $400. I went back and forth quite a bit and would prefer a big Quincy compressor, or something similar two stage... But in the end if the $400 compressor will do what I need, spare time hobby metal working, spraying, auto body, then I've saved a some money. I already plumbed it up so that I can connect my portable compressor to it, between the two I should be able to get 15.4CFM at 90PSI.
My 2nd best bang for the buck was one of the 5HP single stage compressors with ~16CFM, some were available for $800. I decided if I needed to spend $800 I could get 2 of the $400 3HP compressors giving 20CFM @90PSI and 120 gallons of total air tank. Hopefully this will be sufficient for my needs and last as long as I need, I doubt that I'll feel like messing with this stuff in 10 years or so.