I was looking at getting some studded tires for one of my bikes, to ride around Wisconsin this winter, and am having a hard time trying to decide which one to choose.

I have a cyclocross bike that seems like it would be the perfect choice, but I also have an Xtracycle that I've read really good things about- longer wheel base= more traction in winter.

Any help out there for someone who only wants to do this once?

Jon