Best Bike Locks?

Alright, so my bike got stolen two days ago securely locked with an on-guard u-lock. It's likely that they used a cordless electric saw to cut through it, although nothing was left to verify. My question is, is there any lock that can't be cut by one of these saws? I know a lot of people use the heavy duty chain locks, but are these any more secure?

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Permalink Reply by John W. on January 19, 2012 at 6:35pm

Sorry to hear about your bike. I'm using a Krytonite Evolution Series 4 LS (14mm shackle), Kryptonite New York Fahgettaboudit U-lock (18mm shackle), and a KryptoFlex 1007 Looped Cable 7' (10mm braided cable). Both wheels are locked to the frame, frame to the post, and the cable just makes it look like there's a mess of stuff to cut through for my bike. I usually throw the cable through my rack, rear wheel, frame, and/or anyone else's wheel/frame that don't have their wheels locked up. Total for all three is ~$120. Next up is the Kryptonite M-18WL...long lock with 18mm shackle.