Well, if it's casual non-sanctioned racing (Like something you'd find at a parking lot track) the best bet is probably a Duratrax or a Rusty. I race my Bandit in a dedicated class for it at my parking lot track and it's a blast. However, it's no good for serious competition. For my "Real" racetrack I bring along my Team Losi XXX-T MFE.
Associated and Losi are the better choice if racing is your main priority.
If pure backyard fun and versatility is your goal, go for a more durable Duratrax or Traxxas vehicle.