The other regs with worldwide availability is Mares*. The 62X is their compact high performance first stage. Pair it with any of their adjustable second stages. This will save you hundreds of dollars versus comparable ScubaPro regs. You don't get anything more for your money with ScubaPro in terms of performance or durability. They are actually priced very similarly in Europe, but SP jacks up its pricing in North America because it's the better known brand.
I'm also going to second the Hydro Lite suggestion for a BCD. It's rugged, light, compact and the crotch strap makes for a secure fit. It's a much better solution than a cummerbund when you are in the water. DGX makes a similar system with the advantages that it's a little less expensive and it is modular so you can replace individual parts of it's ever needed (it ships fully assembled):
DGX Gears SoftPack BCD Package
Or if you don't mind a bit of setup, you could go with a backplate and wing, this gives you the advantage of further streamlining because you can ditch the relatively bulky fully adjustable harness of the above for a simple webbing harness.
* There's also Aqualung, but they've recently been through bankruptcy and were just bought out by the parent company of Mares. We don't know what the future is for their current regsets.