Seriously look at these air compressors. and read the description field. It will be a quick education on what to look for at least.

http://www.eatoncompressor.com/catalog/item/504747/6474775.htm

I have one and will go back their for my next one (if I need one). I have a 80 gallon true 5HP and I run my blasting cabinet. Here is a portable 2hp. Look through the site and give these guys a call. If you want, you can talk to the president of the company too.

http://www.eatoncompressor.com/catalog/item/733537/8749662.htm

I have a 2hp 20 gallon that will work most of my tools. It's 34 yrs old. I the last week I have used a 1/2" impact, 3/8 rachet and my cut off. It probably doesn't have the CFM as the one does in the above link.
Get a belt drive and not a direct drive. Also look for cast iron cylinders.

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