300C Tires

My 2005 300C has 25K highway miles and it already needs tires badly. I'm not impressed with the continentals that came with the car. I have researched tires and there are not a lot of tires that fit. My preference is a performance all season, which I have not bin able to find. Any recomendations?

I had 26000 on my 300C and the tires were so cupped that it sounded like I was driving a truck. The dealer worked a deal with Continental to give my $50 off per tire, only problem was I had to stay with the Conti's yet, but at least now it runs like a new car again.