First of all security needs depend on where and wen locked, so add your city of residence (or if you're worried about privacy one near it) to your profile. Then clarify what your needs are, ie. all day outside while at work, for 1/2 hour while shopping, 5 minutes while you buy ic cream, etc.

Lastly, ask the question of the commuting or living car free forums, since those folks are much more dialed in to parking security than people here who encompass a large spectrum of riders, and come to this forum for technical/mechanical info.

FWIW while you're here. Yes, Kryptonite pays claims, but requires proof and thieves often take the lock with them, or toss is somehwere where people don't think to recover it. IMO engraving won't help, since it won't deter a thief, and the odds of recovery are tiny.