Ok, so I went to my local bike shop and wanted to pick a decent lock for my new $280 Specialized Crossroads bike I got from CL. I saw a $40 Kryptonite lock which seemed about right, it was the series 2 STD: http://www.kryptonitelock.com/Produc...=1000&pid=1205

Alright so I drop by Walmart and then I see another Krptonite just like mine only for $16.99 called the U409 which looks practically the same except that it rattles a bit more when you shake it, the protective cover over the U part of the lock is a matt finish rather than a glass, the cover to the key hole is different but the thickness of the steel of both look the same. In fact, I could even fit the U part of the U lock from the walmart lock into the series 2 lock. From a safety perspective, are both equally as good? Is this enough lock for my bike? Thanks a lot, I just don't want another bike stolen.