As Sim said, anything Iwata is a sure win, avoid the Neo range. They are branded Iwata but made by another company possibly Sparmax and do suffer from issues.
The Iwata Revolution is a fantastic brush and very capable with a 0.3 head and needle, great first time brush but spares can be expensive.
Avoid H&S, they look great brushes come with all the bells and whistles but really do have consistency issues after a few uses. I know a lot of people who jumped on the H&S bandwagon, loved them for 3 or 4 months and then binned them off.
Sim being one of those chaps.
Badger. Made in the good ol USA, I cut my teeth on a Badger 200- Great beginners brush, really forgiving and relatively cheap spares. Does exact what it says on the tin but lacks finesse. Just not up to detail painting. I still have a badger 150 held as a reserve brush.
Procon - MR Hobby brushes. Relatively new in the UK but these are fantastic. Iwata quality but at a fraction of the price. The range mirrors the Iwata range as the brushes are made by the same company In the same factory. Subtle differences between the Iwata range so you can see the heritage of these brushes. I have one for detail work and I love it.
wot he said. Make sure you get a regulator to adjust the pressure/airflow.
I keep looking at my H&S brush and think I must use it, but never do. Irritating as it was not cheap. Not a patch on the Revolution