Mambas
As a mod on YourMicro.com, I've seen this so many times. Have pocket money, will buy Mamba 8K, Comp.X
These things command respect, they are insanely fast, in fact too fast as far as I'm concerned and I talk from experience as I have a
decent collection of Micros, brushed, brushless and all 3 of the popular Mamba systems: 5400, 6800 and 8000.
Most Mamba owners are under the misconception that they can "turn the motor timing down" via the MambaLink software. You can adjust the timing to control the throttle curve, acceleration and braking, but you are not going to tame a Mamba 8K in any big way. it's still fast.
A Mamba 8000 is not only fast but it will devour a standard drivetrain after 2-3 packs. You'll be replacing spurs, dogbones, diff gears and a whole lot more if you don't keep it in a straight line.
The 6800 has more torque than the 8000 and is the fastest I would dare to run on a Micro. even that commands respect at all times. I've whupped 10th scale nitros with my Brushless M18, it impresses to no end, but it's still a little too fast for "bashing"
My firm favourite for off road is the 5400. Lots of torque, controllable and still very quick indeed.
I run United RC Xtreme packs on my Brushless Micros as budget cells can cause cogging. I run the URC X61 7.2V and the URC X71 8.4 packs, they do cost more, but like anything in life, you get what you pay for
It's all about choice, choose carefully, Mamba systems are not cheap, but if they are installed into a Micro that is capable of withstanding the abuse a Mamba can (and will) place on the drivetrain, then you have something special that will put wall to wall grin on your face and amaze other RC enthusiasts every time you open the throttle wide!