check out the KYOSHO MP7.5 MK3 as a first or ultimate race/beginners buggy. Its been a world champion for almost 20 years so it cannt be bad, can it.

It also comes with a rather good engine, Kyosho GX.21 (3.5cc), or if you go for the U.S sport which comes with the GXR.28(4.8cc) engine. I think the GX.21 is just a tad faster than the GXR .28 although the GXR will have a little bit more pull but will probably drink more fuel. Good luck with whatever you get, specially if its a Kyosho MP.