Get a losi Baja Rey or similar! I race 1/8th and 1/10th electric and the Baja Rey is for bashing. It can run at speed over terrain I'd never take a buggy over. Speedwise on 3s it's pretty similar to a 4s powered 8th scale buggy.
Just my 2p obviously l, don't get me wrong, most 8th scale buggies will bash well but.its not their forte, something like the Baja Rey/traxxas slash etc are literally built from the ground up for high speed bashing.
Whichever way you go you'll have fun though.