On-Road car advice?

[kraegar]

So far I've been sticking to offroad cars and rock crawlers, but I'd like to get something to run on smooth pavement. Mostly parking lot style running, but I'll be taking a trip to an outdoor, professional go-kart track with the guys at work, and the track is interested in seeing what kind of lap times a good RC car can run on their track.

So, I need to find a car. It needs to be able to take minor bumps an unevenness in the surface without flipping, and handle well in the corners. It's a twisty road course track, with a very long front straightaway.

I also need to do this on a budget if I'm going to do it. I don't have numbers yet, but hopefully under $500.

I do have some decent LiPos already - SMC 2s 5000mah, so being able to re-use those is a plus.

I'm clueless on the street cars, help!

(I was going to go with the HPI formula ten, but it keeps getting delayed, and I'm not sure how fast it'll be, and still handle)

Tony