How about a back inflate BCD? They offer all the comforts of "standard" BC with trim characteristics of BP/W. The lift bladder is behind you and along the tank.
I dive a Zeagle Stiletto. Similar to Zeagle Zena. It has enough lift to dive cold water 7 mm but weighs only 7.2 lbs which is perfect for travel. The harness and cummerbund are also modular to help customize fit. I've taken it to the Caribbean and to Hawaii, packs just fine.
I prefer Atomic regs, start at about $500 for entry level, although just about any reg for that price will do for recreational diving.