In the song list on the discography, is it worth indicating any 5.1 mixes available? At the moment it just seems to be if there are differences in the song (e.g. Heathen tracks, TVC15 from Stage). However I would argue that any 5.1 version counts as a remix and significant enough to warrant a mention.

Good point. Maybe someone with the appropriate equipment should present reviews of those titles. I can't play them!