I just picked up a set of Kumho Ecsta ASX (V rated). Just wondering if anyone else used them on their STS? I didn't want the Goodyears, and the dealership wanted $900 Cdn for them, or $1,000 for Michelin MXV (or some crap like that). These appeared to be a better tire from other buyer's on tirerack, just wondering if anyone specifically has used them on the STS, and what I can expect? Thanks for any info!