Double action is the way I would go(and have done so).
As for brands any of the following will give you a good A/B:
1.) Badger, Thayer and Chandler, Omni & Vega
2.) Iwata, Tamiya, Olympus, Gunze Sangyo, Wave
The first ones are american made, the second ones japanese.
Each of those ranges will have a variety of A/B to choose from(Siphon, Gravity, etc).
Personally, I like the japanese ranges.
Word of advise rather than going for a specific brand check what is easily available where you are in regards to spares, accessories. You don't want to be stuck half-way through a build waiting for parts or worse your A/B to come back from the manufacturer from repairs.
Also go now for a good A/B, yep, might cost a bit more but you will be rewarded later on for it.