Six Gallons isn't really big enough for two Gouramis. Especially if you get male + female. When they get ready to spawn(and they will) the male will get very aggressive, and since there is nowhere for the female to go he will kill her.
they are beautiful fish and need and deserve a little more room. Just my thoughts and experience
The store only had males, so he is a bachelor for now. We'll see how it goes, and maybe I'll think about getting him a little friend so he won't be lonely. If it's of another species, what would anyone suggest? I wish I could get a bottom feeder to clean up the bottom of the tank, but it seems like most of the little cats like to be in groups...