I'm contemplating replacing the run-flats on my 05. I've got 17" factory alloys, and I was wondering what some of you guys would recommend on types of performance tires that would be good to replace my currents with. I've read of many people doing this and enjoying the ride quality and handling much better. Is there any downfall whatsoever to replacing the run-flats, or problems that it may cause? I want to keep the stock alloys I have as well, no after-market rims.