My vote. Stick with the stock back tire. On the east coast I can't see the need. I honestly don't think those atv ties are going to get you anywhere the stock tire won't, and if they do you probably shouldn't be there on a Tdub. :-)
With the trouble people have been having getting them on, I feel it's just a matter of time before someone looses a digit or worse. And for what? An extra inch of rubber? I know they look bad ass though.