Yup. Rev 4 would be a good one to try. My best advice, that same advice I give most all the time is to call Bblades and let them do the recommending for you.
I gotta ask why 6100 RPM? That's making them sing pretty good. You need good drive oil for that. PM me and I'll hook you up.

The cam was designed for high-end power. I couldn't spin past 4500 last weekend...and that was a 26 bravo and 30 mach. I don't think it's the prop at this point though. I'm having fuel/air/spark issues because my plugs were fouled and soaking wet with a new Daytona ignition. The carb was just built by Patrick at ProSystems for my motor so that really shouldn't be an issue unless something is messed up and its just dumping fuel but it also seams to kinda lean out at WOT.

I know I have a bad ground somewhere so I am reterminating a lot of wires in the bilge and changing out the fuel/water sep, and then going from there. I just bought a 28 mach but I really shouldn't have any issues spinning that. Mach has been the best handling prop for that baja hull i have seen.