I have a Paasche VL, it's a dual-action, siphon-feed brush. I didn't buy it necessarily for those features, though; I bought it second-hand at a flea market years ago, when I was getting ready to start using a brush. It's a quality brush, reliable and rugged. I have dropped it on the concrete floor in my basement without any damage. Paasche's support and customer service is very good, too. The only thing I don't like about the brush is that the paint cup has to dress to one side, either left or right. That means I can't quite hold it like a pen.
So I decided to look for a brush whose cup is in line with the brush, in the center. I mentioned that over at FineScale, and another forum member gave me one that he had, an Iwata Neo, wouldn't take anything for it. I needed to get a different hose, but otherwise, I've got the two now.
I use the Paasche more now for basic work, like priming, or applying base colors to a model, and the Iwata for more precise work.
As far as a compressor goes, I use a Craftsman 1 hp/125 psi compressor with a 3-gallon tank. I got that because I have air-powered tools in the garage and I don't have to worry about noise. I have considered getting an Iwata compressor, though, with dual connections so you can have two brushes going, and as quiet as a refrigerator compressor. One of the guys in our club demo'd it at a meeting, and it is truly that quiet. Then I'd keep the Craftsman in the garage permanently and keep the Iwata compressor at the bench.
Hope that helps!
Best regards,
Brad