Really if your going to upgrade you want to steer clear of the power compacts. T5's are an all around better choice. The difference isnt totally about the wattage, PC
bulbs will degrade much faster, which means you have to replace them every 6 to 8 months to keep the proper light spectrum for your corals.
T5 bulbs cost 2x as less and only need to be replaced every 1.5 to 2 years. plus you have more room to change out bulbs for different spectrums to suit what you like in your tank.
roka64 is totally right, xenia is really cool, but it will just keep splitting and splitting. some reefers find it incredibly annoying to constantly prune back. Just so you know what your in for down the road. Green Star polyps also are very aggressive growers.
Glad you came round on the fish, its the right thing to do and so often on here it seems that people just get too stubborn and refuse to do what is right because they want a "dori" soooo bad. Your on the right track! constant research and questions is the way to success, and dont ever think that you have learned it all.