1: Super Lemon Haze is anything but; "solid." It has major hermie issues.
2: The Church is half stable, but it's mediocre smoke at best.
There is only one true White Rhino and it has long since been renamed Medicine Man by Scott Blakey (AKA Shantibaba) who created it, along with the original White Widow and many others, but who then after getting fed up with Arjan Shantibaba sold his portion of Green House Seeds to Arjan, and left taking all his genetics with him, and he opened up Mr. Nice Seeds (and renamed some of his most famous Cup Winning strains).
It's not like the quality of Green House Seeds White Rhino slowly went down hill over time. When Scott Blakey left, Green House Seeds no longer had real true original White Rhino, or White Widow or Great White Shark or Neville's Haze, or any of the other strains that Shantibaba created. Green House Seeds was stuck doing what everyone else was doing, making. When Nevil later sold out his share of the Green House Coffee Shop and left taking his genetics with him, Arjan had even less and had to replace them with more knockoffs and more new pure garbage.
As for Nirvana ..... it is so terrible that is may be the singular seed company that can actually make Green House Seeds look good in comparison.
If it came down to growing Nirvana gear or growing bagseed, I'd grow from bagseed.
People, learn who is a true quality breeder and who is a pollen chucker masquerading as a true breeder, learn wht seed companies are quality seed producers, learn the originals and pick them over cheap knockoffs. Stay away from 'flavor of the month strains.' They are always way more hype than anything else.