New to Tiny R/C, not to R/C

I spent the large portion of my childhood racing Associated R/C cars like the RC10, RC10T and RC10GT.
I saw the tiny NASCAR in Radio Shack and now im hooked.... one of the guys at work has the Zap Toys Mini.....

What I would like to know, what cars am I missing out on that are better than the above mentioned....?

Where I work be has lots of downtime and I work anywhere from 10 - 14 hours so we were talking about setting up some little races.....

anyways, here I am.

Whats up yall