ZCI High Torque, hands down. I run them in nearly all of my builds. More torque-y than the SHS, and combined with low ratio gears (I use 13s, typically) rate of fire is phenomenal. I also use an 11.1, though. I'm running a ZCI High Torque in my MP5 on an M95, 12:1s, and I'm getting about 20-22 RPS on a 7.4v, no mosfet.