2 bulb is fine for the easy care softies and the hardy lps IF you put them high up in the tank. I though it was enough too. I actually got another 2 bulb fixture (thus making 4 bulbs over my tank) so I could keep higher light macro algaes like sargassum and photosynthetic gorgs. It also gives me a much better selection for bulb combinations If I want more growth or more fluorescence, etc. I can pretty much do what I want now.
I would suggest reasearching nems some more. I dont think you 2 bulb fixture is going to cut it depending on the nem.
My tank thead is in this section. (skas 28 macro algae display) Just under this one
