the Orphek is only 24" long, so you will need 2 of them and its ~$900 per. I also believe Orphek does not use 3w CREE LEDs, which to me is a big minus.
if you are spending that kind of money I'd easily go with two EcoTech Radion XR30 LEDs instead.
another idea would be two AI Sol lights.
or if you want to do the DIY route the Reef LED Lights kits would work great. I have two 36 LED XP-E kits over my 75 gallon.
Do some real research and it'll all come to light.
If you want get a DIY kit from Rapid Led and i'll put it together for ya,i just finished doing a 36led kit from them with their controller for my 30g cube.They have fast shipping and cheaper pricing than reefledlights.
While i support the locals,reefledlights is more expensive,hence that is why i chose Rapidled.Plus they are cheaper shipping and no taxes!!!!!!!!!And Rapidled is in California which blows my mind.Anywho Rapidled is the way to go for me.Your final decision is yours to make.have you ever tried reefledlights, its local and go for soderless if you are handy,quicker to put together and good options with more LEDs per fixture. reefledlights have more in stock and cheaper.