I use a Jobo CPP2 with both Expert (4X5) and 2500 series (MF). For B&W, I like ABC+ Pyro. Lowest rotation speed is about 22, I shoot for 25+/-. Formerly I used a CPE-2+. One speed 75. Quite honestly, I see little difference, if any at all, on the MF work between the two speeds.

Cheers,
Geary