I know they're relatively obscure, i.e. not mainstream at all, however, I am absolutely IN LOVE with Wilson's work, as well as Opeth.

I will qualify that by saying that I'm really not into the prog metal scene very much at all...

Because I love to turn people onto epic new music, I'll post a few songs from Wilson and Opeth to check out:

1) Steven Wilson -- The Raven That Refused to Sing

https://www.youtube.com/watch?v=n8sLcvWG1M4

2) Opeth -- The Drapery Falls (off of one of my all time favorite albums ever, Blackwater Park!)

https://www.youtube.com/watch?v=hcbrKshzYXQ

I LOVE Porcupine Tree. Never listened to Opeth but I've heard of them.

opeth and porcupine tree both are amazing bands ...

Wilson's/porcupine tree are awesome. I've seen porcupine tree live 17 times and have been lucky enough to meet the band. See opeth once, blackfield twice and Wilson's solo band once. Can't get enough of his music. The bands he is involved with are the best thing since Pink Floyd

Porcupine Tree and Opeth are probably two of my favorite prog bands, they're so fabulous omg