In my experience, if you drive on any dry pavement at all, studs suck. A good snow tire will do almost as good on the ice, without the problems with studs everywhere else. Studs on dry pavement can almost be like driving on the ice. I can't tell you how many times I got my car into a good slide trying to avoid somebody who cut me off. And this is coming from somebody who drives on ice every single day from October to March.
These for example, are great:
http://www.tirerack.com/tires/tires.jsp?tireMake=Bridgestone&tireModel=Blizzak+DM-V1I can understand if you don't want to spend the money on new tires.... stud them if you must... but please don't put sheet metal screws in them!
