I have a slash, a revo 3.3 (with a .21 on it), a rc18t that is ridiculously decked out, a blackfoot (vintage), and a micro-t. I worked on the 18th scale to get it able to run outdoors and after a lot of suspension work it will run on off-road tracks and take jumps close to a buggy/truggy. I race the slash and with minor adjustments in a spec class (shock oil, rpm gear cover, cvd's) I have broken a few things on my revo and rc18t but only 1 thing on the slash (Bearing casters - replaced with rpm ones for 9 bucks)

If you just plan to do an oval with no jumps than a slider or slash (depending on the size of the oval) will work. I think the slash will be more out of the box ready to go but I can't really say that for sure as I do not have the other models. Change the oil in the slash shocks and it is really RTR.

MeBaD