I made the switch from halides to T5's and love the difference in color and temp (I also dropped in watt usage with the switch).
I keep an even mix from SPS to zoas and softies.
BTW, john at FAOIS made a good point to me a few months back when he told me you can get shimmer lines by using any point source illumination even as simple as mounting a small incandescent bulb over the tank. I tried it just to see and it worked. I didnt leave it up becuase I dont need thick shimmer lines, but it did work.
Halides are great, dont get me wrong. I used them for years, but it's all personal preference as stated before.
Wes