sounds like to me a buggy might be what you need. an MT would work fine too, but a buggy's gonna handle a little better and possible be a little faster on the same setup. like already said, any Savage is a great choice, but like you said you don't necessarily need top of the line, so... Traxxas has some good stuff for appluications like this, although its not gonna be quite up to par with stuff like the Savages. take a look at the Vorza Flux from HPI, Slash 4x4 or Stampede 4x4 from Traxxas, or some kind of stadium truck like an E-Firestorm from HPI or Traxxas Rustler may be what you want too. you just gott choose