dunno wat's going to be ur preference and budget, got few types also, expensive and cheap.

I think there's a thread talking about airbrush and compressor, can try search for it to understand more.
basically it's with or without airtank for the compressor as other features are mostly standard these days.

airbrush go for 0.3mm dual action, for general application.
0.2mm for fine work, 0.5mm for large area spraying.