I just ordered 2 A360WE for my 120 48x24x24. I saw the 350 in person at our LFS in Fort Walton Beach and I was completely taken back by the look and the size of the SPS colonies. I should have taken pictures to put this debate to rest. The main display is a deep 240 and has 4 350s mounted about 18" from the water. He also supplements with some cheaper DIY LEDs for a longer photo period however they are dimm and really for extending the viewing time within the store as the owner put it. He also has a cube with one 350 I would say is around 50 gallons. Again here he has very large SPS colonies with deep bright colors. They include montis, birds nest, and lots of acro. I needed no more convincing once I saw this place. I made my decision, after much research, right there and placed them on order. I spoke with the owner he bought the lights over a year ago to replace the furnace heaters of a light HQI MH for the Kessil. Being they are so new I see that the point others have made about not seeing a huge SPS dominated tank is simple, time. The technology is new and there simply isn't the time to grow out those tanks from start. The facts are that Kessil manufactures the LEDs for these lights not a third party. The parent company knows lighting and specifically grow lights. I spoke to representatives of Kessil and they release little specific data on the blend and make of these lights because it is proprietary and closely guarded although most of the info you want to know they will give you. Sure the lights are some what of a spot light and so is the sun. It's a matter of taste frankly and I don't see it as a problem on the tanks I saw personally or for my self. I was very heavy on the Radions before I finally chose the 360. The Hydra 52, Radion pro, and the Kessil 360 are all great lights but I everyone, everyone I have spoke too could only speak positively for the growth and look of the light. If I feel the shadows are too great and decide to supplement with t5s fixture I have siting in my garage it couldn't possibly diminish the of these lights purchased new for less than 750$ per 2 fixtures. There is a sale currently for Kessil at my LFS. That's the price nearly of a single Radion. Control ability and independently for intensity and blue/white mix with your Apex is a wonderful plus is you want it. I wouldn't say the A360WE would replace a overdriven 450w Radium for color or growth, first because I haven't put them on my tank yet second there isn't enough time to make that comparison so I wouldn't even try. I am sure however I will be much happier with these over my tank than two 250w or 450w MH because of the heat and cost of power. No more chiller needed, that's another huge power hungry, nose making device I'll gladly give up. This may only apply to me but the Kessil are dual voltage, meaning if I move to Europe in the near future I can use my lights there easily. I am military and move often.
I have read many more negative results from other LED fixtures and this was my second biggest reason for the Kessil purchase. When I research products i skip the 50-300 positive reviews and just read the negative ones. This gives me a way better picture of what to expect from something I am about to buy rather than all the post of people saying "this light is awesome!" Once you've done than and can say, "well I can live with that" then I know I found the right product. One of the few negative reviews I read was of someone who believed that only intensity could be controlled with his Apex, of course this is false.
The A360WE is 10-15% brighter than the A360W.
The gooses neck mounting hardware is easy to install and allows for you to simply adjust height position by just pushing on the rod.
Simplistic controls for intensity and color blending.
Silent, will not be heard over any other equipment on your tank. No other high end light I know of is this quiet. The fans still produce noticeable noise.
They are small, and do not look like a giant flying spaceship (as my wife put it) like a MH fixture. The clean design is very pleasuring to the eyes, especially for picky European eyes that hate almost everything about my hobby yet was pleased to see is wasn't putting a spaceship over the tank again.
I hope this helped the OP as the only reason I decided to reply because I was once in his shoes. My last advice would be to seek out a tank that has these lights going and view them for your self.