I have dwarf neon rainbows, they were well worth the money I paid for them and they go really well in my tank, i wouldnt say they were top fish but definately upper middle. They are realy cool, well worth the money I reckon, I had 4 but the other male didnt aprove so i now have 3, 2 females and a male.
I also have a school of neons in my tank and to be honest they spend more time near the bottom than the top.
Glass catfis make interesting viewing, but i prefer pearl danios, they are active and look good.