I have an 8 bulb T5 with a Reefbrite XHO Actinic Blue strip on my 5 X 2 125 Peninsula and the colors are amazing. I can grow anything like a weed in my tank. I around 75 SPS corals in my tank and they are grow very well with nice color. I rarely have heat issues and I like the look of the fixture.
You can see my tank and a "review" of the Reefbrite XHO here:
http://www.canreef.com/vbulletin/showthread.php?t=79427
I have had two fellow reefers sell their MH setup and buy what I have after seeing how nice the tank looks. Hope that helps.