Shamu,
I am thinking of going with 245/45/18 up front and 275/40/18 (base, stock 18" rims). This will keep a staggered setup with bigger tires than I have right now.
For tires, I am considering trying the Continental Extreme Contact DW. They have gotten some good reviews:
http://www.modified.com/tech/modp-09...s/viewall.html
And they are about $800 for four corners (including shipping).
Since this is my first foray into autocross I don't have the skills to push the car hard enough to make (in my opinion) a big enough difference that I would need to go with a much more expensive tire.
In regards to sway bar settings ... I have stillens up front and rear ... any suggestions regarding stiffness front vs. rear?