In reply to jacoob81: At the moment you'd be hard pushed to find any decent winter walking conditions. I'm just back from new year in Glencoe and although the gullies still have some of the white stuff in them the tops are pretty clear.
I would say that Fort William is as good a place as any to base yourself, with the Mamores, Aonachs on the doorstep and the Grey Corries and Glencoe a short drive away. if you want somewhere a little more remote try Wester Ross. there is great walking to be had up there.
J