i was on summer kumho ecstas and just put on a set of 17" blizzaks on my g35, and what a difference. As much care should be put into a winter set as a summer set.
http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs1364.snc4/163685_657091586426_39502440_36663347_1343959_n.jpg