I vote the E-firestorm flux.
I got mine awhile back, and its pretty awesomely fast.
certainly outruns my 22,2v brushless emaxx and brushless castle creations 2200kv e-revo in terms of speed.
its quite difficult to control at high speed on 2S lipo.
on 3S lipo, its only possible to control in a straight line on a flat long road.
I placed a BEC so the ESC can run 3S lipo without overheating.