Thanks for the feedback, people. And surprisingly positive feedback, I should add... Though of course I somehow knew I could count on at least you in this issue, Rick.
To be honest, I don't actually listen to Sabbath much these days. Those two pieces -- Spiral Architect and The Writ -- however, have been in my mind for a while now, as something that could perhaps well be played here on the station. Therefore I also decided to go through some of my CDs from the band a couple of days ago, in order to refresh the memory about some of the other pieces on them. And this resulted in my suggestion, which of course could have mentioned more than just four pieces...
I think it would be nice to get at least a few well-selected pieces on the playlist in the future, preferably the more mellow and melodic stuff. Adding whole Sabbath albums probably isn't appropriate, given that a part of that material in all of those albums (at least from the 1970s) is indeed a little bit too ... hard and obviously not really "progressive" (whatever the term in its most puristic sense eventually means).
As for Fluff... well, it's instrumental and relatively pretty. Probably nothing really special or "progressive" though, that's true. Another such piece is, for example, Laguna Sunrise on Vol 4.
And then there is of course this simple but beautiful ballad, Solitude (Master of Reality)... with Bill Ward (I think) in vocals.
-Methem