Diy Sump

Hey guys im currently build ing a 55 reef. And need aump ideas as wellas skimmer ideas. Im most likly going with a 14 gallon aqueon, it is a standard 10 gal tank just taller. I was going todo the first cchamber 8 inches the second 7 and the last 5. Its going to be my filter sockand heater in the first maybe a skimmet if it can fit. The second a pump for my gfo reactor and any other pumps for various equipment down tje road. The final will hild my mqg drive 5 with my ato. My second option is a 15inch then 5 inch chamber.

what would u recommend. Laslty which skimmer schould I get. Bubble magus 3+nac. Reef octopus nwb110 or sc aquarium 65 gallon.