Why do you want to switch? If it is just purely for asthetics then I would personally look into the ATI powermodules that have both LED and T5 and are fantastic for both growth and colour. Your welcome to check them out at our place. Or... you could add some reefbrites to your existing T5.
If you just want to switch to LED, I recommend the radion or the new GHL Mitras. The new Mitras are crazy bright and the spectrum on them is outstanding. We recently swapped out some radion G3 Pro for these lights and what a difference. Not only are we using less lights over the same area, we have way more par. I haven't tried the new Radion yet so I can't comment on those, but I am sure they are also great.
IMO those are the best high end LED fixutres out there. For SPS I would not give up the T5, just add some LED for colours. Combo seems to be the best of both worlds.