I have seen several reports saying cheap studded tyres don't last. Especially if you ride on mixed surfaces and not exclusively on ice/snow. Depending on your situation and mileage it may well be a good idea to pay the USD60 up front (instead of paying USD25 yearly for 6-7 years).

For an earlier discussion about Nashbar vs. Innova vs. Nokian see this thread, for example:

http://www.bikeforums.net/showthread.php?t=81648

--J