This system is doing well, and has led me to start up a reef tank. The new tank is a reef-ready 58 gallon system, equipped with an ETS protein skimmer, activated carbon, about 90 pounds of Fiji live rock, and a 192 watt power compact fluorescent light system. Also, I am 25 years old and have a degree in chemical engineering, with a specialization in environmental engineering and water and wastewater treatment. Fish and aquariums have always been a passion of mine. Hello Paul, Your new aquarium will certainly benefit from the addition of live rock.
Coralline algae does well in fairly low levels of light.
It seems to prefer fluorescent lighting to strong metal halide lighting. The 60 watts of fluorescent light on your 75 gallon should maintain coralline algae quite well, though it may not grow as quickly as it would with more fluorescent wattage. This set-up will easily support all of the organisms you listed. The disadvantage to having live rock in a fish-only aquarium is that it precludes the use of any medications in the aquarium should there be a disease outbreak. It also makes it difficult to catch fish if you need to do so.