I had standard (here thats standard) 16" , 195 45 16, and yes ride was better (I have eibachs also). on 17 (205 40) ride is a bit too hard and not nice for everyday. 16" rims will make it a bit better, not much but you will feet it.

on 17 it handles better on good roads and look much better than on 16

and st with standard springs are great to drive over those shitty roads, but looks a bit too high