Modern regs are pretty much all good breathers. In that sense, most any brand will do you just fine. For doubles, it's really helpful to have a bottom port. That improves the hose routing.
I've used most brands at one point or another. I'm using Deep6 now and I'm a big fan. They are great breathers. The company also treats you like an adult and will provide a class to train you how to service them. When you start tech diving and accumulating a bunch of regs, this can actually save a lot of money. Oh yeah, they're also cheaper than ScubaBro and Aquafung.