We are going shopping to possibly purchase our next aquarium. We are looking at 75-100 gallons which will slowly become a fish, LR, and "easy" soft corals set-up.We have planned to upgrade our light system to a four bulb PC from "hello-lights.com. It contains 4 65 watt bulbs, 2x actinic and 2x 10,000K. Will this be okay for the low to medium light requiring corals? We plan on using 2 powerheads. Suggestions for size? We also plan on 2 heaters. Again suggestions for wattage? We also plan on adding 40 lbs of pond cured live rock from "reeftopia.com" The price is half that of our LFS. In our current 46 gallon set-up we also run a Fluval 304 filter. Although I know most find this unnecessary, we feel that it gives us a "little leeway" in error. Since we are new to the hobby and trying very hard to "do it right", might a filter help us out here? We will also add a skimmer to the new set-up, but I understand that this can be done at a later time. We will add additional live rock as the tank cycles. On our 46 gallon the cycling only took three weeks, and our ammonia and nitrite levels never really soared. We use a 2-1 ratio of regular sand to live sand, which we will also do in the new set-up. Any other suggestions will be appreciated.Thanks--Grace