With the right lens configuration, you can use LEDs on any tank. 40 degree optics can be used on tanks up to about 30" (bottom will be for softies and lps only at that point), but you can go tighter, like down to 25 degrees for a heavy sps tank. The spacing has to be reduced, so that adds more LEDs and cost.
The AI unit can have the lenses swapped, but I don't think many owners are willing to crack open a very expensive setup. With the new series, there are fewer lens choices, but the ones that are available are tighter than stock, if that's the direction you want to go.
The Maxspect units cannot be sold retail in the US, but there is nothing stopping you from importing from out of the country. I'm not keen on the versions that have the 30W LEDs (way too much PAR, and poor longevity on the LED). The 110W looks great for most mixed reef tanks up to about 20" deep, and the price is great.
Different approach though. Your's is more of a T5/PC appearance with light everywhere. Mine is more in line with the Japanese style of lighting and is more spotlighty. Works pretty well though, but coral placement has to be thought out a little more.
I do. These are a little old, but they show how they are mounted. I'll get some updated ones up soon.
http://i261.photobucket.com/albums/i...C_03020001.jpg
http://i261.photobucket.com/albums/i...C_03120001.jpg
http://i261.photobucket.com/albums/i...C_03080002.jpg
Since those pictures were taken, the lamps got raised another 8". They will be going up another 3" when I end up mounting the track to the ceiling. Currently, I get about 130 PAR on the sand with the PAR38's 30" from the sandbed. These are the first gen 15W lights, and not the newer 21W units. It's a mix of 12K and 20K lamps, alternating.
I have some new livestock in the tank and will be taking pictures of them this weekend, so I'll show you guys the newer setup then.