First off The IR is flat out lying about that CFM rating! Some places have recently started rating it at a more believable 15.6 CFM. Of the three you listed none are really good and the IR is about the worst of the lot, they have a terrible reliability problem, we had one thread in the tools forum here a year or so ago that had 4 different owners that had them with bad motors!
By far the best deal to come along lately is at, of all places, Harbor Freight. For a lot less money than the IR (which is a China import BTW) you can get the two Stage American built US General that has got to be the best buy for the money anywhere! These things are built by Belaire in the USA (except for the pump and that is excellent quality built in Italy) and come with AO Smith and Square D electrics. I don't know how they can sell a domestic built compressor for less than the China imports but they do and it is an unbeatable deal!
Don't be afraid of HF for this tool because that thing is good quality no matter who is selling! Also they are "on sale" just about all the time so if you see it at regular price then check the HF internet sales and store sales papers for the sale price, if it is not on sale anywhere right now then just wait a week or so and it will be.
Last edited by oldred; 04-09-2011 at 11:21 PM.