I used to use the the HV-Maxx, and Serum, Dafni, and Coolhandcountry recommended the 7xl over the 9L I was originally hearing was the typical config with the 9918/9920. Since the 9920 was not in stock, I ended up with the MGM160. I don't know about the controller versus the 9920, but what I do know is that the 7xl/MGM160 shreads the HV-Maxx. I had horrible luck with the HV for whatever reason. If you have seen some of the other threads around here, I'm sure nbcaznmaster would help you test out the different motors. You'd just need to send a setup to him. :p

As far as cogging goes, the 7xl/MGM160 is just as smooth as the HV was. I enjoy walking the GMaxx up the curb with Moab 40 tires just as well as my Revo. GPS also had it clocked at 36MPH on pavement.

ya I am way beyond the hv-maxx at this point. I need power!

MT-enthusiast, what kind of run times do you get with the mgm160/7xl combo? on how many cells?

I use 14 cell GP3300s and 3700s. The run times vary depending on run style of course. I've had run times as short as 8 minutes bashing hard and probably about 20 (got lost in the moment) just curb crawling etc. I can get actuals in a couple days if you want. I haven't run 16 cells because I'd have to get a new charger which isn't doable for the moment.

I started off with 6cell packs. I put 2 on one side and one on the other. 18cells charged with intelli peak twin