I've owned an E-Maxx and Bandit and I currently own 'Pedes and a Rusty. Liked 'em all (ok, the Maxx not so much) but the Slash I bought from my LHS today is easily the most fun Traxxas product I've driven. Here it is.
As soon as I got it home I pilfered a Mamba system from my 'Pede and a MaxAmps 6000mah lipo and strapped 'em in.
Actually, I ended up taking the ESC from the 'Pede and the 6900 from my (son's) Rusty. The Slash seemed to like the torque of the 6900 a bit better than the higher voltage 7700. Geared 15/90 it ran smooth and relatively cool up to the low to mid 40s on pavement and gravel. Spent about an hour bashing! Great fun.