I love the look of my 14K's, but i notice a night and day difference in coral growth when i have the 10K's in there. I don't like the color as much, even in a lot of the corals, but they grow VERY fast under the 10K's. I've using the Xm 10K's that put out a lot or PAR, so upgrading to 3 Ebay 14K's to see if i get better growth than the 2x10K's, hopefully that'll works? haha, well, that's what i've noticed anyway. Check out sanjay's lighting chart if you want to find a good bulb, might help.
http://www.manhattanreefs.com/lighting