as jimmy says,any of the current crop of buggies and truggies will do nicely,avoid the cheap ebay specials like the tornado,bazooka etc,go for a hong nor,xray,mugen,xtm or kyosho and you wont go wrong.
jimmys hong nor went well on sunday and as he says,user error was at fault not the car.
the conditions on sunday werent the nicest to drive or marshall in but you cant help but smile when driving these things,so much fun...tyres last a while,certainly longer than electric anyways.
you dont need to spend hundreds on engines too,£80-£130 will get you a cracking engine,im running an sts 21b engine(£85) and its as quick as anything else on the track.
im only running a standard ko servo on the throttle/brake and i can still make the car stand on its nose if i turn the brakes up
dave