We need to know a little info first. What are the tank dimensions, what do you plan to keep, will it be fish only, or corals? What type of corals softies, softies/lps, or sps dominant? What type of budget do you have?
I see more and more people using led's now a days but there are still people that prefer their t5 and mh lights. I've also noticed a lot of people supplementing their LED's with t5. As for what light to get it all depends on budget and what you want from your light and how much you wanna spend. You can get a simple Mars Aqua for under $100 all the way up to fully controllable Apex compatible ecotech radions for almost 1k.