The thing to remeber is not all 10k bulbs are the same as with the other color bulbs. My old Hamilton 14k's had low par and too much blue imo. My new Iwasaki Aqua2 14k's have much more par and are more inline with a crisp non-yellow 10k color-wise. I think Ideally the iwasaki 6500k, Xm10k or Iwasaki aqua2 14k with actinic supplimentation for overall color and growth.
If you want an idea of what the hamilton vs Iwasaki 14k look like, go to the Icecap forum, I just posted some comparison pics over the same tank.
---John