I'd go for 185/55/15 or 195/50/15.
175/60/15 has a rolling radius that is similar to your current summer tyres (I'm assuming they're 195/45/16?). If you go with the 65 profile, it's quite a bit larger. I'd be going with the 60 profile myself.
I have 185/55/15 winter tyres, Awesome in the snow!