Just listened to "To Hell and Back" - what a song!
Actually not too familiar with SX. I picked up their live album when it came out and played it to death - it's brilliant. I used to love cranking up the volume just to hear the crowd going bonanza.
The Odyssey and Paradise Lost are also in my collection, but neither really 'clicked'. The title track on Odyssey is fantastic though.
People used to say "you like DT, you should check out SX!" but I never got the comparison. I mean, I guess they both play "prog metal", but they sound totally different.