The Revo would be last on my list - well not even on it really.. I don't like Traxxas' business model of selling overpriced RTR's which need upgrades to boot, not to mention that the 3.3 is a notoriously PIA engine.

From the other two, both are good, though the Losi would be better IMO. The MGT might need some shock-part upgrades, from what I hear. The Losi is notoriously strong and fast. IF you plan to get big air, I would try to find a New Era roll-bar to firm up the chassis.. Re Losi parts support, that's kind of up in the air. I have two LST2's, and a fair bit of parts, but it seems to me parts are still out there, and will be for a while. For all we know Losi will rerelease some form of LST at the Nürnberg toy fair next month.. But yeah, there's some uncertainty there. Nevertheless, if I were in the market for a new MT, being honest, yeah I guess it'd be kind of hard.. I'd probably be looking at a Savage too..

When in doubt, go with your gut..