I know others might dissagree but why not try a Hobbywing 60A speedy. Admittedly it is brushless only so you would need a b/less motor. You can buy the 60A for about $80.00 on rctech from Harris and maybe Ferral. I am sure you could but a roar legal motor for a similar amount so for about $160-$180 you can get a starter kit and the esc will handle down to about 8t for when you want to go to full stock/superstock.
I have 2 of these for offroad and they have been very good.

Terry