Either of those fish represent excellent choices... my vote is for the gobies though, because 3 fish is better than 1... EDIT... at least for a 10 gallon
That said, I'm undecided what to do with my pico... I originally had planned on 2 - 3 Sharknose Gobies, but now I'm considering having only one larger fish. 2 or 3 - 1.5 inch Sharknose Gobies or 1 - 3 inch Cherub Angel, Talbots Demoiselle, or South Seas Devil Damsel (these fish are all aggressive and would do well in a small species tank, as long as they stay under 3" I'll be okay)... Ah, decisions decisions.
And let me know if you need more info about the LEDs, I'll gladly divulge my secrets
