you need to set a budget first... there really is no limit to how much you can spend... if your on a high budget... you would get lipos or limn batts, shultz esc, lehner/neu/plettenberg motor. your choice of specific esc and motor will depend on your decision on the battery... my suggestion is go all out... what turned my head onto all this brushless stuff was a video of a savage with a plettenberg big maxximum on 6s lipos... once i saw that it was all over for me... lol