I find the blue is over powerful and will be throttling mine back, but this brings me to ask what sort of lighting you are looking for? 10K is white with only a small amount of blue where as 14K is more medium blanced and 20k is quite blue. Maybe this is more what you are looking for, the other end of the scale rather than 10k?
If i wanted a more blue tone I would definately not be looking for 10K. In the UK my old tank I used to run 14K's as I prefer a less blue hue, and will be adjusting my two Ai's more to this and running the blue at about 50% at midday and lowering to 8% by the evening for moonlight, but also adding in the mix a simu-L to provide a sunset and sunrise orange glow, although this is still in theory until i see the effect, maybe more at night rather than morning.