I'm running Recaro Profi's in my car (the XL), and I use my factory seat belt. the belt does not go over the bolster, it goes through the belt slots on both sides, works great and the belt fits just like the factory seat.
I love the seat for a daily driver, very comfortable. I had Recaro SRDs before the fixed back seat, and I'm glad I changed.
Your best bet is go to a few local track days or auto-x and ask guys if you can check out their seat, sitting in as many as you can is the only way you will know.