At Tire Rack you can get the UHPs for:
275/30/19 for $175 (these fit )
225/40/18 $95
shipping $52 appprox total for all 4

Total will be about = $592.17

Then pay someone about a hundred bucks to install.

 

I am with Max here, I am running Falken 452s all the way around (20s at each corner) and I am putting my second set on this weekend (before the Dragon ). They are great tires.

 

I have used quite a few different brands of tires, and I think Nitto's are the way to go. I have used the INVO on the stock wheels, and they were great! very quiet and smooth ride, and lasted MUCH longer than the stock conti's. Also, the car didn't pull as much on uneven pavement like it did with the conti's (the car had a mind of it's own driving on a highway under construction). I tried the Toyo Proxes (don't remember the exact model, supposed to be their high-end) and they were TERRIBLE on the Crossfire. As soon as I got on the highway, the car felt like there wass no grip, and I was actually afraid to drive the car. The next day, I went back to the tire shop to get the Nitto INVO's put on. I'm currently using the Nitto NT555 on 245/35R19 up front, and 285/30R20 on the rear. They have wonderful grip, but are a bit noisy.

The biggest difference with cheap vs. expensive tires are the number of heat cycles they can withstand. When you get a new set of tires, the grip is fantastic because the rubber is soft and new. As the tires wear down, the main reason they loose traction before the tread is gone is because the rubber starts to harden after repettitive heating and cooling. The better tires can handle more cycles. Oh, and are usually quieter because they use better materials for the sidewalls to absorb road noise.

Places to buy, shop between goodyaertires.com (shipping included in price) and Tire Rack - Your performance experts for tires and wheels. Sometimes tirerack has a better deal, but more often, Discount Tires Direct has the best deals. I have ordered 3 sets of tires, and 2 rim and tire packages from them and I will continue to buy from them.

The single most important thing for tire performance is wheel alignment. Tire Kingdom doesn't cut it. If you bring your car to a specialty alignment shop, you will pay more for the alignment, (expect $100 or more) BUT your tires will last MUCH longer, and the car will drive better.