Rainbows Or Peacock Gudgeons?

[fishwatcher]

I have the 20-gal set up with a pair of german blues and 6 danios. I'd like to add either a trio of neon rainbows or a pair of peacock gudgeons. Which one would you go with? I think they both will be ok as far as the ph/temp levels are concerned, but they are both so pretty I can't decide! I wish I could have them both...
Would either one fo these work in a 10-gal with a trio of dwarf honey gouramis?