I have two HV Pro 6.5 systems, one in my E and one in my wifes E. They are very reliable and take alot of abuse. Personally i think that the MMM and the Novak run pretty close to each other in torque and speed with 4s LiPo. Yes I have two MMM one for me and one for my wife in our new ERBE's. Mine failed after 20 minutes and been running my E ever since. I run it against nitro's and ERBE's on our small neighborhood track. I still hold the fastest lap and best points with my good old faithful and dependable Emaxx/Novak. Course keep in mind it is a small track and the ERBE's cant really let loose with 6s. But I still love my Novak powered Emaxx.
Switch to Lipo batteries and get good ones, and youll be amazed at the difference. DO NOT run a MMM system on NiMh you will damage the batteries or the ESC or both.