I actually got a good cryosleeper location for once! (Lots of mods, Nex random sector w/ customized settings, so sharing the seed is, alas, not really useful.)
...Unfortunately, I found it rather a long time after I was already well-established in a system much closer to the core. Still! A nice place with all the resources you'd need in-system. Admittedly, a few of them were sparse enough that you'd need alpha cores to make the place fully self-sufficient. (And the closer-to-core system I'd already set up shop at didn't need alpha cores...)
I think I'll go colonize the place anyway once I have some spare administrator slots. Just feels wrong to leave an actually good cryosleeper system empty.