FAQ: OnGuard I got one in this Type
Armored Cables ? OnGuard Locks
I like Abus Better than Kryptonite.. I have a Chain and integrated lock . and a Bordo Folding link lock (easier to carry than a U lock.
their armored cable types are better than the OnGuard's
ABUS Bike Locks - Bike Safety and Security / Recreational Security
BUT Leaving any bike on the street overnight is asking for it being stripped while you are asleep.
Consider a Folding Bike , Folded You can bring it In, no doubt.