I bought an Iwata HP-C and a Badger 150 used off of eBay, along with an Iwata SmartJet.  I like the HP better, I think, but the Badger works very well.  In fact, since the nozzle on the HP broke, the Badger is the only one I have.

I second the recommendation of Vallejo Model Air products.  They are very easy to use.  The Vallejo Model Color need thinning and I never seem to get it right.  I am trying adding retarder because the paint dries and clogs my needle.  The Iwata is easier to clear than the Badger.