Well, if you think about it, lighting a 30" tall tank, like a 110, for a full blown SPS reef, this light would come out to be the most viable option. Within a few years it would equal out in price to paying for 2x250MH bulbs, AND it puts out more light.
So lets say:
Ballast, $250
Pendant (extremely good reflector), $150x2
Bulbs, $75x2
Chiller (1/4hp), $600
With that estimate, within 6 years of replacing bulbs every two years, the costs would equal out. This doesn't even account for the extra cost of running your AC more because the chiller will heat things up. Its just that the Solaris is a lot more upfront. I think it is a really cool system, but definitely need to wait for that and the Ecotech Vortech powerheads ($350) to come down in price.