I have a Sears 6.5 hp/ 60 gallon upright. It's rated at 9.9 cfm @90lbs and 14.2 @ 40 lbs. When shopping for a compressor, look at the cfm rating (most air tools like a sander or a spray gun use 10-13 cfm) and the air capacity (the bigger the tank, the cooler the air, plus the longer you can run before wiating for the compressor to "catch up"). Mine's an oiless type, but the pro's all use the oil-lubed compressor's since they last longer, are supposedly queiter (all of them are loud in my opinion) and usually have a higher cfm rating. However they are also about twice as expensive, too. Mine cost about $450 a few years ago, and are about the same price now. Do I like it? Yep. Would I buy one again? Yep.