The cheaper Kryptonites are poor, the more expensive ones, as in the ‘New Yorker’ are good.
I’ve been using the Abus mini D for a few years in London. A solid lock that’s too small to fit a jack inside but also too small to fit round a lampost. I also have an Abus 1000 cable lock that fits round my waist for anywhere i feel is dodgy. If you can double up it’s good.
If i can find where I bought mine I’ll post links.
I think that a battery powered grinder with a slitting disc is a bigger issue than bolt croppers now.
If you will be leaving the bike in a regular spot, leave a big beast of a chain a a well lubed shutter style padlock in the area for you to use when needed.
Wheels have security skewers, and torx security fasteners fitted to stem, top cap, seat post and saddle clamp. Sometimes you need to grind the heads down a bit to fit.