They're great cars for winter driving, if you take them out.
As for rust, yeah - you do run into some issues. However, my car that lived in NY all of its life until it got to me (and I think it was used mostly as a winter rallyx or ice racing car its last owner) isn't too bad. Everything is covered in rust underneath, so you get a nasty surprise in the face trying to ratchet things out, but stuff for the most part is staying intact. One of my control arms in the front rusted completely through and snapped in half, and it looks like the other side was replaced not long ago, but that's all that's on the brink, really (except maybe the swaybars).
Anyway, rustoleum is your friend, aluminum control arms are your friend (think sti), and really, don't worry about the rust for a few more years down the road.