@Seaweed Doc most dive ops won't let you go without a BCD, but I use a VDH wing from @Bryan@Vintage Double Hose and a freedom plate from @Eric Sedletzky
If your LDS offers you a steep discount on scubapro that is a very compelling reason to stay with scubapro. What other lines do they offer discounts for you?
Atomic for sure. They're a dealer for Zeagle and Mares products, so I imagine those would also be possible, though they don't stock the regulators. (And perhaps others. I'm in no rush, so "off the shelf" isn't critical.) My general thought there was that Scubapro is likely to be reparable if something has an issue overseas. Perhaps wrong?
In an earlier post you'd mentioned matching regs for twins: That's a direction I'd like to head. The Zeagle D50 that is my "main" reg I'd use as backup and to loan to friends on occasion.
And, if not obvious, just kidding about vintage equipment to match the regulator. I learned to dive with horsecollars, and dove with folks who eschewed a BC altogether.