Sounds like a good setup there.
I'm running an 80g with 2 male firemouths, a texas pair, 2 male gt's 1 female and 1 female salvini.
I got this tank 2 days ago, because the tank they were in started leaking badly, so i had to get a new one within the hour. After these 2 days, the smaller gt male and female are courting as i'm typing this, and the male is already very thoroughly cleaning out a small den with a flat smooth rock.
They have never shown any attention towards each other before today. I added what i thought would be feeders (Hasemania nana) that are very fast so they will last for a good while in there, but still act as feeders.
3 hours after i dumped 10 of the Hasemania nana in the tank this all happened. The 9" GT male is also cleaning out a "nest" although he is not paired with the female.