The XTM MMT is maye the fastest Mt out but pars would be hard to find. Losi makes solid trucks so you cant go wrong there. I have the MGt 4.6 and 8.0. The 8.0 has GOBS of torque but its not any faster than my Savage with an LRp engine. The Savage Xl is a great truck but the5.9 is crap. I would say the XXl is going to be the best all around truck.