I have keep both a RBTA and a digitata in a tank that had the sam lighting. They all did okay...i had to keep the RBTA well-fed, and the digi didnt have much growth.
Personally, I wouldnt suggest any of them with just pc lighting: 1) the RBTA is going to outgrow the 10 gallon very fast; 2) the sps wont have very much growth at all and probably wont be all that healthy.
JMO,
Jesse
p.s. what is your Ca, nitrite/nitrate, ammonia, alk, temp? Do you have a skimmer? what kinda filtration are you running?