Hi gotcheaprice, I think that the cardinals are going to be a bit much for that tank. Given that they reach up to about 2" each, I would only stock 4-5 of them and leave it at that as far as fish go. Even then, a 10 really doesn't give much room to play around with. I've never kept those rasboras, but there are quite a few nano species (lambchop rasbora/CPD/etc, theres a list somewhere) that would probably give you the effect you are looking for. Just try not to overstock, as it can easily lead to water quality issues.
*edit* i looked up the phoenix rasboras, they look awesome, and are small, I wouldn't hesitate to put 6-7 or so in a 10, with some inverts.
*edit* i looked up the phoenix rasboras, they look awesome, and are small, I wouldn't hesitate to put 6-7 or so in a 10, with some inverts.