mountain,
I read and read before deciding on what bulb and wattage I wanted. I went with 175w because the bulbs are cheaper, less heat, and I feel its adeguate lighting to still have a succesful SPS tank on a 75g. Mostly inspired by PlayFair's 120g (featured Tank of the Month) using 175watters.
As for the 10k bulbs, I originally was going to go with Iwaski 65k but after researching, I heard and seen a lot of pics of them being yellow. So completely for asthetics I went with Ushio 10k (I have the PFO ballast and have heard of a lot of problems using AB 10k not firing)
I have a slightly green tint when running them alone (heard they whiten up after 40+hrs burn in, mine only have 16hrs on them). With my VHO actinic on though it is a nice crisp, clear, light with a touch of blue. Enough to flourescent the corals a bit. The picture I posted does not give it justice.
As for the 14ks I never tried them and I believe that CoralLife is the only manufacturer to make a 175w 14k bulb. But I may be wrong.
HTH