I have a lot of fun racing in the stock Slash class at my local track - I also have fun with it outside bashing around. After replacing the bearing carriers with RPM parts and upgrading the hinge pins to Anza ones, I rarely break anything.
But do yourself a favor and get an SC10 or XXX-SCT (whatever is more popular at your LHS or track) for racing. There are plenty of used SC10s found here all the time - you should be able to snag a nice one for a deal.