Some suggestions:
-The ampmaster is to much pump for a return, you'll have micro bubble problems from too much flow in your sump. More turn over is not always a good thing. Tunze's & other PH's can provide a better suited in tank flow.
-175's are fine, but you will be limited to the Iwasaki 15k bulb, which puts out the par of a 250...upgrading maybe something to consider.
-Reevaluate the PC's, they are poor supplement lights. T5's or VHO are much better and offer better spectrums/kelvin.
-the RS80 is underpowered for a 125, I'd suggest a DAS EX-2, ATI BM200, or similar model.
HTH and good luck
