I use Sutch Village. I've also tried ImpeREAL Sutch - last time I checked it wasn't as complete as Sutch Village. The two mods are incompatible although I did see a patch that apparently makes them work together on Nexus at some point. The issue there is that from a lore perspective some of the dialogue won't make sense since Sutch Village assumes the city was lost, not sitting next door. Haven't tried the DC Sutch.
As for Kvatch, I use Kvatch Rebuilt 1.1 since it's the most compatible with other mods. Versions 2+ introduced some unpatched incompatibilities, most notably with Fort Akatosh Redux. Unfortunately finding that version may be tough since the Nexus page is hidden. Version 2.1.2 can still be found on Planet Elder Scrolls and Dark Creations but as I mentioned it has some incompatibilities which is why I don't use it.