I am going to be getting a 75 gallon tank here soon and would like input on my overflow/sump system

I will be using an eclipse large. I know the large is for 100 gallon plus, but I like the idea of the second siphon drain in case the main drain gets plugged. Is this something I should be worried about or will the medium be okay?

I am thinking a 1 inch return line from the pump as I will put a check valve inline. Is that too big/small?

I will be going with a 40 gallon breeder for my sump using a submerged sump following Joey's videos.

For the return pump I am thinking the Jebao DCP-4000.

Anything I am missing or should do differently?