Why not buy a ballast that can run either? The icecap ballasts and other electronic ballasts can run both SE and DE bulbs (except for the xm bulbs). The fixtures are cheap and easy to wire yourself. If it were me, I would buy the icecap 250 ballast and run DE at 10K and your two PC's would be actinics. I think this would be a good combination of color and growth for hard corals. If you want to run softies, you may have some trouble with that level of intensity in lighting. I've been there, I use to have a 26 bow front tank with a 250 MH (SE) and two 32 Watt PCs. It can be done, just watch the temp in the tank.
cheers,
Darren