Not the best speedy to get...
You want a sensored ESC with dynamic timing... dont need to understand that just yet... get in contact with cobraracing he will sort you out.
As for a chassis, here is a good link (also sells batts, chargers and so on)
Nice car (mine is on its way... should be here today or tomorrow!)
Depends on how much you want to spend ie second hand or new.
Back to the speedy.... get on the Aussie forum, or the hobbywing/xerun forum to find cobra. He sells Hobbywing speed controls and will point you in the right direction.
I personally run the hobbywing... first at my cub to get one... and they are catching on now as they are THE BEST bang for buck.