Love the look of MH (shimmer
) too much to give it up on my main reef. Also, like Burrows stated, I would have a hard time shelling out for new bulbs all the time. I usually get a very good useful lifespan from my 14000k Aquaconnects (almost 2 years on my last set). Still got good growth & the colour never changed although it was not as bright (based on PAR meter, it was time to change but my corals were still doing fine).
Anthony