I rode through the first half of last winter on part worn supercorsas (Sc1/Sc2) and they were ok. Not so good on sheet ice, but nothing much is, the lack of back brake is more of an issue than the tyres. The only drawback is that the don't last 1500 miles (I doubt a brand new rear would make 1800miles).
If your not track daying every few weeks, go for something more road biased like the diablos
My RSVR had bridgestones when I got it and the front was utter crap, it steered fairly slow, didn't warm up that well and understeerd when pushed hard. A Sc1 front transformed the bike.