I'm running a set of Dunlop SP 8000's on the Stock 2000 SLS Chrome Rims.
These are sweet... the cornering is incredible. If you slam these on the front wheel drive and have a set of bald, worn out rear tires, cornering will be a breeze. If you have tires with a lot of grip on the rear, all the pressure transfers to either the front left or right tire depending on the direction of the turn since the rear end of the car is still "on track". With nice bald tires in the back, the rear end of the car simply slides around the turn allowing the front of the car to remain significantly less cocked onto one of the front wheels.
If you are more interested in the ultimate traction for stopping (for safety, not for hard cornering), then get four of these. Two of them is like being glued to the pavement. Four of them would probably increase your traction to the extent that your gas mileage would drop at least a few mpg.
Just two of them with the added traction and surface area in contact with the pavement (255 vs 235 width) dropped the mpg by about 2 (20 to 18).
Enjoy, I know I have.. and will continue to if I can ever get my car's electrical system back in order.