if it was me personaly doing it all again I would get yourself a good 2nd hand b4.1... either an lrp sphere tc or v1 lrp sxx esc both you can pick up at reasonable price. go for a 7.5t motor then when you get your thumbs back convert it to c4.1. I run the above set up last time I run at Bury and still got 2nd in the A final.The b4.1 i the easiest way to get racing at a good level and are bullet proof nowadays cars can be made to go faster than you can handle and lipos are just silly i am still running 5600 30c in my 2wd its more like 90% thumbs 10% car these days