i did a bunch of reviews on the airbrushes i use on my youtube channel. they might help you out some.
this is my main detailing brush
http://www.youtube.com/watch?v=AnKnPKEqEyQ
you can check out the others. Remember you get what you pay for but in the long run you will have way more issues with badgers then paying more cash for a iwata.
sum it up
had a badger 2020, over a year i had to replace the needles like 10 times ($12 a needle), send to badger like 3 to repair (free but paid for shipping).
Iwata HP-CH over a year just kept it clean and kept on working.