Hey, I'm not a huge PT/Steven Wilson fan, but I do have a good selection of his music.
I think "In Absentia" perfectly some up my thoughts about the band and the man: I love half of it. The other half not so much.
I have, though, enjoyed SW's concert BD's and saw PT almost 20 years ago.
Wilson does make some fine music and seems to be the pre-eminent artist who also does surround.
As a guy who's also a musician and audio engineer, I'm all for 7.2 surround, but not quite sure how you can integrate 7.2.4 hemispheric sound in a more compelling way than standard surround.
One thing I do know: you can't properly listen to 7.2.4 sound without having a lot of acoustical treatment in that room. Untreated walls and ceilings are not going to cut it.