Wrong person to ask really, I prefer big monster trucks
If you use a Castle Creations system, the 4600kv motor on 3s lipo should be more than plenty, or just the MM esc and a medusa 50mm motor in something like ~3000kv flavour should provide more grunt thahn you'll ever need or be able to use/control. I'd look into the HPI touring car WK and see what did exactly, there should be lots more info floating around the forum if you dig hard enough.