I was wondering if anyone could advise me on speed controllers:

I have recently purchased a partially built robot which uses two reliance motors and gear reduction axles from Roger Plant. The builder, Chris, says he has blown up several 4QD boards trying to run it on them (not sure which type) and recommended Vantec controllers.

The RobotEq looks better on paper, having 80 amps continuous and 250 amps peak, while the Vantec RDFR38E has 80 amps continuous and 220 amps peak. Also, the RobotEqs RS232 input would make interfacing a lot simpler, while the Vantec only has servo inputs.

Is there anything to recommend the Vantec over the RobotEq controller?