Out of those four, i cant say anything about the Team Corally stuff, since i have never even seen one up close. As for the other three, I have to say this about the HPI Jumpshot. After abusing one a few times, they are really durable (the Jumpshot MT is actually fairly decent in light snow), but, when they do break, it can be annoying getting parts, but, me personally, that wont stop me from buying them, since most of the parts are on eBay, and, its how i get most RC stuff anyway. They do make a bunch of aluminum parts for them, but, as for what other aftermarket stuff, i cant say what is or isnt out there, because i never looked. ECX, after owning 2, i would never own again. I just had way, way too many issues with them, constantly. Traxxas, i don't really have much of an issue with, since after finally owning one (and, now i own several), and, even using just stock parts, didnt break as much as i expected it to, but, it did break more than my Fury did, Overall though, in my experience, they arent as bad as they have constantly been made out to be. Most though, for 2WD, will either end up with Traxxas, or, if they are like me, a kit (ok, so they start out as kits, but i buy them as sliders used). I am currently looking at a Losi SCT (22SCT), and another Associated SCT (RC10SC probably). Even though i don't race anymore, i have found that TLR and AE race kits make more durable bashers, for some reason.