Just looking at the success that others have had with the 250W systems on a Solana made me want to upgrade from the 150W. In addition, I planned on having a low rock structure to keep an clean and modern look to the aquarium. So the light has to travel through approximately 10 inches of air and then 10 inches of water before it reaches the corals. I was just scared the 150 W wouldn't be enough.
My temperature fluctuates between 79 at night to 84 mid day (probe is 3 inches down from the top of the tank), so i would say I have a little bit of an issue, but it is acceptable.