I would keep an eye on things, I have heard that changing the gas combinations changes the color temp to a higher kelvin. and hat luxim is working on getting that adjusted right. something else to consider 100% on the fixture seems to be way too high for corals, so dimming the fixture is simialr to dimming leds to save even more power. whether that is just market speak, IDK, but I am in the same boat with choosing fixtures, I do not want to go led only to find i have gotten the wrong color mix, or need more. Plasma bulbs lasting so long is also tempting.
that being said the quality/quantity of light could be adjusted with a cel film like they use in stage/theatre lighting, you lose a little light, but you can shift to innumerable colors, they are designed for much higher heat then the plasmas "supposedly" put out.
but I imagine the real test will be when they come down in cost, I do like the yellower tanks a bit more then blue as well, so they seem ok to me, but then again I love the way my tank looks in direct sunlight... abet not the algae it grows due to it. I will not argue with the beauty of some of the 14 or 20k lit systems though. they have incredible pop to them when the lights hit anything that fluoresces