i missed this thread until now
heres what i think im going to go with master u lock with a flat key (freebie) through the front to whatever im locking to and im going to spend the 50 bones on a new krypto mini and use that through the frame to the back wheel
as far as carrying them around, i had one of the master locks before and it fits pretty good between the strap and my chest on the bag secured by the stabilizer strap and i can hardly feel it unless i torque my body is some strange way
im leaning towards the krypto mini because i know its a perfect fit for the back pocket unlike some of the on guard locks
thanks all!