I live in Oklahoma... what is this winter you speak of?
I really don't know how they handle on snow, what little snow I do get is layered on slick as snot ice and the car handles like slick poo on ice, as do most cars. I don't think lowering would really bother it any, unless you went extreme.
Most of the people on this forum seem to do ok, Drunkie has a 04+ and it is lowered to the EXTREME and he drove it in the snow lowered I think, but he later bought a AWD Saab so the GP could stay in the garage. PM him and he could probably give you an idea on how they handle on snow.