I would recommend getting the least bulky, most streamlined and simplest BC that fits you well. I've seen a number of divers go for the big BCs with the up and down levers and the like, and within a year, almost all of them are back here telling us about the new BC they bought (and, I can't resist saying it, it's usually a backplate and wing system )
TSandM is always right.
I had a jacket BC, then a back inflation BC, then last year I got a Halcyon Eclipse BP/W.
No comparison. The Halcyon is SO much better than the last two BCs.
BP/W divers tend to be a bit evangelical about their gear, but I will say that this is NOT just for tech divers. I take mine to the Caribbean and dive in a 3 mm shorty wetsuit, or put a weight in the back and use it with my dry suit up here. It's terrific - VERY stable, VERY streamlined, tough as nails, extremely comfortable, and infinitely customizable. It's also great to be wearing a rig that is 6 lbs negative (instead of being positive even when empty, like a traditional BC)... less weight on the belt or in the pockets.
Two downsides - they are a bit more pricey, and if you dive in a t-shirt they don't have much padding (unless you add it). But even with a minimal exposure suit (like my 3mm shorty), mine is very comfortable.
Mike