Here is a link to my recent build through modularled.ca.
http://www.canreef.com/vbulletin/sho...hlight=125+led
Super easy to deal with and great price. Plus, he is pretty close to you as he is out of Red Deer. If you have any questions, please feel free to ask me as I just finished this build.
I went with 38 LED's over a 125 gallon using the new 3 watt Cree HEW's for white's, so I think 24 should be lots if you use the same HEW's.