I'd just buy a NY lock from Kryptonite, or similar from Onguard, get Pitlocks to protect the wheels, brakes, stem/fork, and seat, and call it done.

Then, depending on the level of security, use SB's locking method, or have a chain lock as addition, and use mechBgon's, locking both wheels and frame (preferably to separate objects). If you lock to a rack frequently, you can always leave one lock hanging on the rack so the only lock you need to ride with would be the U lock.