One vote for wing style BCD for fotographer. Some years ago I put together a backplate & wing system for travels containing a light weight aluminium backplate and Agir wing plus two tank straps. That has been easy to travel with. The only disadvantage is the need of weights but, as Tim explained his system the setup allows you to distribute weight optimal way by using weight pockets - or even put a weight to the tank band if needed. This setup has been extremely good for shooting macro: you don't have any extras in front of you so you can go low if you use angled viewfinder. For wide angle the advantage is not so obvious. However, I would not switch back to jacket style BCD.
If you plan to travel with your setup you need a reliable but light regulator. For years I have used Apex Flight with no problems. When I bought it, it was the lightest on the market. Unfortunately, I think, it is now discontinued model.
During the years I have had both Scubapro and Apex regs. Both are quality brands and have worked fine. The reason why I switched to Apex is the availability and quality of service in my area.