Holy 4x4 batman!

So assuming 265/35/20 front and 305/35/20 rear who makes a good street tire that doesn't cost an arm and a leg?

What size tires
 

Do a search on TireRack for those sizes and see what pop up. Read customer and technical reviews and go from there. Look for deals and rebates too

Nobody.

Nitto Invos are available in 255/35 and 295/35, which is close, and about as cheap as you're going to find a set of 20s.

That's about what I paid for my tires, but the 305s only last about 15k miles so that's $650 in tires every 8 months. Fortunately the fronts are at 40k miles and are holding up very well; I will probably get 75k out of them.

:Wedgie:

I'm guessing you have drag radials on the back?

Yeah, I wouldn't want to drive one of these cars without them.

Arm and a leg is relative. On my C5 I was running 18s with a 265/35 and 295/35 BFG Goodrich KDW2s and that was just under $1,000 at Discount Tire with warranty on all four tires. I really wanted to go with the same tires but I found these for a really good price and matching sizes front and rear for the 19s I have.

http://www.treaddepot.com/group/pr4p.html

-Alex