Berlin filtration vs. Power filters.?

I have a fifty gallon FOWLR tank cycling w/out fish containing a 250 bio wheel power filter, a Skilter 250 skimmer/power filter combo, a three hundred and thirty six watt metal halide light, half to one and a half inches of live sand, two thousand five hundred and fifty gallons per hour of water flow, a nine watt UV sterilizer, heaters, and ten pounds of live rock... My question is do i really need fifty to seventy more pounds of live rock? Since i already have two power filters, one with the bio-wheel for biological filtration and the other with a skimmer. And if i did go ahead and get all fifty to seventy more pounds of live rock would i need my bio-wheel filter? I think id need the skilter since it skims. and the main componts of a Berlin filtration system is Live rock, Skimmer, and Lights.And What would be better? The Berlin filter system, or the power filters, or both? I would like the Berlin system because it would be more quite and natural looking.. Also i heard the skilters suck but you can put a small wooden air diffuser in the skimmer tube to increase bubbles.. Is the skimmer tube the water bottle looking thing that the bubbles form in? So would i use the airline intake and hook up a wooden air diffuser and just put it in the skimmer tube? Or would i need a new pump for the diffuser and leave the airline tube outside the pump? Thank you.