Which Air Compressor should I buy?

Yeah what ever you don't waste your money on an oil less one ever. You wont ever find service parts for them and you will loose your hearing attempting to use them.

Big thing with the CH 60 gallon one you can rebuild most of that if it does break and if you can't or don't want to then you can modify motors or pumps for higher end machines to your big tank

I was going to go with the CH 60 gallon one but the wife stepped up and helped me get the IR 60gallon 5hp one :)