While looking up and studying about locks, I did find some very useful information. According to at least one article I read, 90% of the bike thieves are drug addicts and winos. In addition to drugs, cash, booze and prostitutes, bikes are also a form of currency on the street. A low-life with tools can break a cheap lock on a Huffy or Pacific, then turn around and sell it for $40.00 to buy booze at the corner liquor store, or trade it for some rocks from his dope dealer. So for that, I would say that it is the responsibility of us GOOD people, to not let the street people have access to something that would enable them to support their bad habits.

Regardless of the type of lock, no matter how strong it is, there's always something that can cut it unless it had the same hardness as a diamond. if someone wants that Peugeot bad enough, they'll get it somehow if it is not kept under close watch. I once had a Peugeot like the OP has, only it was a maroon PGN-10 that would be extremely difficult to acquire these days. It was stolen right from my grandmother's garage after my brother left it there for a few minutes after a ride. Sure, her homeowner's insurance reimbursed me for the replacement cost. But that bike was also the last one the dealer had, so there were none available. It would have been far easier to find a Schwinn Stingray in pristine condition.