my custom onguard pitbull mini. i just got it in the mail, found one for pretty cheap, <$20, and it's better security rating than the onguard bulldog mini.
took off the outer covering and metal mount piece to save some weight and increase clearance on the inside of the lock. also i think it looks cooler, i may tape up the bare metal parts later.
here's a pic of the plastic and metal trim that helps protect the key hole from debris. it came off so easily though i don't think it affects security. if i think i'll be riding more in the winter or bad weather, i can always put the cover back on.