Someone please buy Jeffrey's tank so that he may entertain us all with a newer and bigger adventure.
If I may, though, unless you're going to add a ray or two I'd say go with a 96" wide tank instead. That'll just give you even more room for cool photos and more Discus

. The extra two feet also gives many more options for pleasing aquascaping. I'm on board 100% with the height, especially for Discus. I once nearly bought a 96x24 footprint 36" high tank. I'd kill to find a 7 footer that's that tall.