Sean,
I recommend purchasing the optional 120 degree Razor lenses to help with the coverage on your 30" wide tank. When suspending the Razor, a good starting point is 10" and adjust up/down to what works best for you.
Reef Octopus 3000 specifications:
http://www.coralvue.com/reef-octopus-sro3000ext-super-reef-protein-skimmer
http://www.coralvue.com/reef-octopus-sro3000int-super-reef-protein-skimmer
Click on the "More Details" tab for bio load recommendations.
Chris