MMM v3- you worry to much, or listen to too many idiots on the traxxas forum.
if you want to run 4s reliably, or 5s in the future, then that pretty much limits you to the MMM, the losi (havent heard much good stuff said about it or the motor so far), or an MGM- which is twice the $ and still not 100% reliable. Beyond that, there is nothing that doesnt come from europe, cost double or tripple what the MMM does, or isnt prone to blowing up if you fart on it (Schulze). You could try a kontronik jazz or jive, but they are still $$$, and have no reverse I believe....
MMM V3 or bust