Haha, welcome to the world of reef keeping. The hottest debate about keeping corals has and may always be, "Which light is the "BEST"?"
The truth is, you can keep all kinds of corals with any of the three types of lights you have mentioned above. There are pro's and con's to each and
everyone is going to have an opinion about what works the best, most cost effective, best par, best colors, best, best, best.......opinion...
The easiest way to get an answer is to say, X= is my tank dimensions, canopy or not. I want to keep primarily softies but maybe a mixed reef, and I can afford to spend X number of $. Does controlability matter to you? Dimming and cool effects or does any of that matter at all. Also, consider cost over the long haul. Right now a good used metal-halide set up can be bought off the for sale forums very reasonably because so many people are switching to LED's. But, you may have heat issues and then there is the cost of bulbs. Not bad on a tank that size, but still something to consider. T5's like metal halides have a great track record, great colors, and if they have individual reflectors they have very good PAR. But you gotta be faithful about changing out bulbs. Lots of pro's and con's on each light.
So, if you will give a little more info about your tank and your goals, I know everyone on the site will help you out quickly. Sorry, I didn't answer your question but with a little more info I would also be glad to help.