Lovely mix, motsy. I have Black Neon Tetras too and I think they're a nice alternative to the Blue/Cardinal Neons. Despite the similar names, they're all different species though.
I've never found them to be nippy although they do chase each other from time to time - as most fish do! :lol:
Tbh, I wouldn't bother with the Dwarf Gourami. They do look lovely but have short livespans atm. You'd be lucky to get them beyond six months as I, and other people, have found. Still you could always have a go I suppose. You might be one of the lucky ones. :lol:
No one falls in love by choice, it's by chance. No one stays in love by chance, it's by work and no one falls out of love by chance, it is by choice...