I was initially checking out the Infinity 2 in 1 Airbrush from Harder Steenbeck , but had to succomb to finances and look elsewhere (Though, from what I've heard it's an AWESOME airbrush. Scott Marshall has been using one on his heads, from what I understand). At any rate, per George's (ptgreek) recommendation, I went with the Badger 360-1 Universal. Haven't gotten to play with it, yet, though; still need to go to Lowes and pick up the water trap I forgot to order. Ooops...
Derek, get an Iwata Cr Revalution that's what I have and it has never let me down, it's what I used on your suit that day, I touched it up for you. You can pick them up on ebay cheap enough.
Im using the Velocity from Badger's Renegade series, and i can highly recommend it. Its a high quality brush and personally ive found it great for beginners.