Mine should be worn out come March as I travel 80 miles a day minimum. I'll be going for conti's or michie's 
Michelins PS3s are brilliant with excellent rim protection.
The Conti 3s are to be replaced in Jan '11 by Conti 5s. The Contis don't have effective rim protection, which is a must with 18" wheels. The ContiSportContact 3s on the Merc now look the worse for wear after 5k miles and those are the front ones! Madam has also kerbed both front AMG alloys beautifully.

Definitely good rim protection would have helped.
If the 5s are anything like the 3s for rim protection, I'll buy Michelin PS3s. Hence my signature.