What does everyone use? I've always just used a Garrison Loop Cable and a Heavy Duty Master Lock but I rarely leave my bike anywhere that is not secure. I don't usually even carry a lock because at work my commuter is in my office with me. I just moved into a new building though and my commuter bikes will be going into a shared bike compound that is relatively secure (inside the parking garage and inside a locked steel cage) but it's made me think about upgrading my locks.
What's everyone's opinion on what the best locks on the market are right now?