I'd go with one of the UK lights, I haven't seen much trouble with those. Which one depends on what you're doing and where you are. I have no idea what the waters are like around rhode island, but I'm guessing they're a little murky like the waters up here. If you don't mind a large, clunky light I'd suggest going for a D8 or D4 with a lantern grip. I had a D8 with a pistol grip and it was just annoying. the C8 and C4 are both fine lights, but are both fixed pistol grips, of the two I'd go for the C4 simply because it's much smaller than the C8. Unless you're in clear waters I'd avoid the C8 LED, the lights doesn't penetrate too well.
My $ 0.02