I am still undecided about what to do with this tank, but I am leaning towards low-tech with manzanita and micro sword. I tried something similar with my 40 breeder (ended up taking micro sword out due to algae issues).
Here's how my 40B used to be:
Aqua_chem showed me some low-tech tanks with micro sword, and I think I could make it work.
Here are some pics of the tanks that I might use for inspiration:
They're the same person's tanks. Both used glut (no co2) and medium light.
I have been thinking about what to do with this tank for quite some time. With a decent piece of wood (or pieces), I think I could make a similar scape like the ones above. I do have co2 in the long term plan, so if algae does become an issue, it will not be perpetual. With my 5g, I kept getting algae because I had too much light. A Sat+ (or the new one they are releasing in Jan) would be dimmable, so no problem with this tank.
As for livestock, all I have planned is a large school (maybe 20) of ember tetras. I am not sure if I will have anything else... maybe an algae cleanup crew of some sort. Maybe some shrimp as well.