Mag 950 would be good. I would go with the 1" flex pipe to the sump but when you buy the prefilter it should have this already.
I use clear hose from the pump and attached it to PVC pipe.
The 90 degree elbow going into the tank and just above the water surface I drilled a small hole facing towards the tank or water surface. This hole stops the siphon back into the sump if the electricity ever goes out.
