There really isn't a best it comes down to personal preference, reef type you are keeping, and a budget. I would start by asking yourself what sort of saltwater aquarium you are planning to keep, long term goals, and then how much can you invest up front for lighting. That will help guide you with a purchase and the best bang for the dollar.
Not trying to be vague but corals have different needs be it soft, LPS, or SPS. Having a bit of a plan or goal or just an idea will save you some money buying something right the first time. Note I didn't even factor in light type, manual, or automated control

The bells and whistles only increase the cost. However, if you have a controller it is something to consider.