What makes more sense..buying a RS4 for high $30K with around 45K miles or a 2010 S4 for about the same price with 30K miles. I know I can chip the S4 to get it close to the RS4, but reliability might be a problem, unless I do many more upgrades. I drive a modded out 2007 A3 (APR Stage II+) and it's super fun, but I'm ready to get into something more aggressive. FYI, I like the 2008 body of the RS4 20 times more!!!