Return pump(s) for new build (36x30x20)

[ashr]

Hey all

I am working away on my new build (36x30x20 93g) and wanted to hear everyone thoughts on a return pump(s).

My sump is 26x26x16 (9" water level).

So I am looking for the best bang for my buck. I could go with a single 900GPH Rio Plus 3100 or two 600GPH ones. I wanted to know what other brands would work well and are silent.

Any info would be awesome.