Last weekend I 'winterized' my elantra, putting the stock wheels and tires back on, among other things. I notice the weaker sidewalls of the oem tires on turning, and I have to drive a little less like IRL and more like daily driver. However, it is VERY nice not to feel every bump and crack in the road, as I do on my 205/40/17 Hankooks. I think personally, I would like to get rid of the 17"s and run some 16" wheels with performance tires. That should provide a nice blend of 17" handling, with the 15" oem ride quality. I never really thought the ride on 17"s was 'harsh' until I went back and put the 15"s on.