With LED lighting you also have to consider the type of aftermarket service that the company is willing and capable of providing. In my experience ACAN Lighting has been excellent. I had a problem with one of the lighting fixtures, they sent me a replacement unit and I just returned the unit that I had the problem with. Not many LED companies right now are going to give you the kind of service that ACAN is willing to provide.
Look at the company's background, track record, ability to survive, product quality etc. before plunking 1-2K in lighting. Making LEDs is not as simple as MH or T5 fixtures,and a lot can go wrong especially in the long run. Too many solder joints, different types of LEDs, different drivers, controllers etc. The simplicity of T5 and MH is just not there in LEDs.
As for controllability, the ACAN has enough control to make me happy. There are 4 or 5 control points that you can set with different degrees of intensity of blue, white, and moonlight. Its way more than I use. I personally have not interest in making my lights do fancy dances, simulate lightning, etc. My corals in the past have grown fine without it, and I don't see it changing anything as far as corals are concerned.
Do your homework, check other sites for feedback that you seeing on the different lights especially when it relates to customer service, frequency of problems etc.
I am currently using ACAN lighting, AI, and Ecoxotic Panorama modules and do not have any long term experience with the others.
sanjay.