I've been running off of a small campbell hausfield for several years now, and its behaved great, but it just can't support my powdercoating business and is extremely loud. I started shopping for an upgrade, thinking I would stay in the 5-700 range, but decided to go whole hog.
In the end, its costing me 1285, delivered, but I would rather look back and have too much compressor than not enough. Plus, we decided to be a little wild, and its going to be purple!
http://www.eatoncompressor.com/catalog/item/504747/206949.htm