I agree with Flo, that is a great cold water tank. I guess your not going too "high tech" with this? i'd try and fill out the back a little more and maybe some small ferns or somthing else that your fish don't eat around the base of the wood.
A week ago I got hold of 6 Cardinal Neons and 4 gorgeous Angelfish (2 silver and 2 dark). They suit the tank really well. I'll try and get some pics when I get a chance, although they are all too active to get a non-blurry shot!