Well personally, I still like the look of metal halide lighting. It's hard to beat. On my FOWLR, even though I definitely dont NEED MH, I still run a 250w right over the center. This gives the fish darker sides of the tank if they want, or light in the center, depending on their moods.
I've ran T5 and MH both, each has their positive aspects but I prefer MH, so that's what I recommend.
If you want really clear water and an ability to handle a even higher bioload, plus have increased oxygen levels which is great for fish like tangs, you could install an ozonizer. Pretty simply to install, just basically plug and play but they aren't cheap. For your system you'll want a 200mg one which will run you around $500 for the basic ozonizer with ORP probe and controller.