Let's say hypothetically I wanted to string up a SE with 13s (including a wound 3rd string) and tune it B to B. What are my options as far as adjustable bridges?

So far I've come up with the following:
1) PRS adjustable bridge. That would work, yes. But they cost $290. The guitar I'm looking at buying costs $300 used... for the whole guitar.
2) Schroeder?
3) Pigtail?
4) Hipshot Baby Grand?
5) Others?

Or should I wait for the new SE Clint Lowery?