Id say Badger, H&S or Iwata but they have so many to choose from it can be difficult.

I used to have the tamiya sirbrush setup and id only recommend it for bigger spray jobs like car painting/clearcoating.

There are also lots of cheaper ones on ebay etc. I have tried a few but after my first 'name brand' i would not go back, that said without them i may have ended up dropping hundreds of dollars on a ab that i did not like action/feed of.

My other tips, dont skimp on a compressor, get one with a decent regulator and a tank it will help get the best out of any airbrush.

Get decent cleaners (usually the ones made by the paint maker) and lubricant, it keeps even cheaper ab's running better and longer.

Finally, get on youtube and check out reviews etc, there is some great videos.