A different (hopefully more helpful) recommendation:
For your regulator, find an environmentally sealed, balanced first stage, and a balanced, adjustable second stage with some sort of heat transfer device. You want at least 4 lp ports (primary 2nd stage, alternate 2nd stage, bc inflator, drysuit inflator), and 1 or 2 hp ports (pressure gauge). This is an any ocean / any dive type of regulator - deep, shallow, carribean, arctic, it won't care.
Tons of computer choices... different brands use different algorithms to calculate your bottom time, some more conserative than others. Big thing here is to find one that is nitrox compatible, has an easy to read face, and whatever bells / whistles you want and can anticipate using.
For your BC, find something that is comfortable. LOTS of choices in this area, and there's a lot of considerations - like if you're diving with single or double tanks, recreational or technical diving, etc. A good starting point would be back-inflate BCs in the 30-40 pound lift range for single tanks, or 45-65 pounds if you forsee using double tanks. If you prefer simplicity to bells and whistles - the backplate and wing setup may interest you.
I'm not sure brand and model specific recommendations are helpful. Many of the top diving equipment manufacturers make multiple products that will do what you want them to do. Beyond that, its personal preference, and no product is really that much better than another.
So... the short answer?
If money were no object, I'd still dive the mid priced gear I have now. The extra $1000-3000 is simply not worth it (to me) for the .05% gain in performance.
-B