I'll be setting up my 20 gallon soon but can't decide on which of the following fish would look best together. I've narrowed it down to silver hatchets, leopard & zebra danio mix (half and half), neon tetras, lemon tetras and a dwarf gourami (either powder blue or flame). After having read the "don't stock these" thread, I'm hesitant to get the hatchet though I like how different they are from the rest and that it's a surface swimmer. I'm pretty set on getting a gourami. The lfs I'll be going to is highly reputable so I wonder whether their neons will be the less hardy ones that everyone speaks of now. I'd love some help in figuring out which combo would look great or your opinions in general. Also, since all of these guys except the gourami are peaceful schoolers, is it so necessary to get 6 for each type, or can I just get 3 or 4 thus giving me more room to get more variety? Thanks!