What's the best suspension for Street Handling?

I really don't have an autocross track within 2-3 hours of me, So I am not too concerned with class specifics.
But if I am at one, I would like to be able to run the car for fun. But I am really looking to make the car handle on the street during normal driving.
I appreciate all the info so far, its really helpful.

Also, the car is being mini-tubbed to get the 17x10.5s in there, plus a custom width Dana 60, just ordered those axles from Doctordiff.

Why are you putting a heavy Dana 60 in it??

Well they usually don't have autocross "tracks" just local clubs that find big parking lots, airstrips, etc.

Here's a list of SCCA clubs in NY: http://www.autocross.com/autoc/neclub.shtml