Congrats on convincing your husband to get you the 10g.
I prefer the 5 girl sorority with 1-2 cories for cleanup.
There may be some sort of fighting/nipping though, so you will have to keep that in mind.
My halfmoon is being lazy nowadays. Lounges around all day, comes by to dance when he sees me and then goes back to lounging on the decorations once I feed him.
Nevermind, he only seems to kick back & relax when it's hot, but due to his long fins, he doesn't dart around the tank like the girls do.
I find the girls more entertaining to watch due to their speed and their personalities. Each the girls plays a different role in the tank.
Some of them will actively hunt snails, while the others ignore them.