The aftershock is a good rig, so is the T-maxx, both have their downsides of course. The stock t-maxx parts can be brittle, and I have heard numouros stories of people who spend more time fixing their t-maxx than running it. Then again the Aftershock also has some issues, such as the stock front a-arms are prone to breaking, which is easily fixed with the RPM arms and lunsford turnbuckles. My LST has the RPM front end and it is nearly bulletproof, think 13lbd rig hitting an exposed half inch thick nail at the track mid flight, stopped it cold, no breakage. The other thing with the Aftershock is things like tires and bodies are limited because of the size of the rig, T-maxx is much easier to mix and match bodies and tires. Traxxas has the good engine replacement plan, Losi does not, but you can put a bigger engine on the losi without modification and the possibilities are greater. All in all I like my LST better than the T-maxx because of size and durability, but I may be a bit biased.
-AxialLST