:P
T5 works.
Korallen Zucht in Germany uses exclusively T5's.
http://www.zeovit.com/forums/showthread.php?t=11269
Let's get a couple things into perspective here:
1. Both sources of light are viable for SPS tanks.
2. T5 is VERY functional and NOT inferior to MH when it comes to coloring and growth of SPS species.
3. All tanks are different, as are the inhabitants of those tanks. One person might experience a brownout when switching to T5, another might experience an increase in colors:
http://reefcentral.com/forums/showth...5&pagenumber=1
http://www.zeovit.com/forums/showthread.php?t=9125 - Check out JWRE's post.
You CANNOT go wrong with either if you plan well from the start. Switching is a game of 50/50.
Edit: Also keep in mind the different types and combinations of bulbs available to each medium. There ARE garbage bulbs and combinations. Don't kid yourself.