anything using a Cree LED
with proper configuration will get the job done well.
i'm a big fan of DIY (i'm a tradesman what can i say) so i personally want to buy a DIY kit from rapidled.com for my own LED
hood. its not only cheaper buy i get my jollies out of doing it and i can build a fixture to my own specs with a good RGB spectrum of light
to light a whole 220g reef that i want to build requires 108 LEDs for sps
and clams and will cost me less the $1000 with all required LEDs drivers and heatsinks even with the plywood to build the canopy it will still be under that mark