I just went trough this post, got me very curious, someone said that they are keeping discus for a while and listening to advise from LFS, very interesting.
Dropping a discus tank temperature below 80, very interesting, I wish you the best of luck.
As stated, there are limited plant selection for discus tanks.
The key here if there are discus in the tank - it is a discus tank.
Wish discus research is key!
If you are looking for plants, look for Gordon, he is on LI