Return pump suggestions

[Oxymoron]

I am looking at upgrading my return pump and was wondering what would be my best choice.
I am running a 90 gal and plan for it to be sps dominated.
The sump that I am using is the model 2 version (picture is also model 2)
http://www.drsfostersmith.com/produc...m?pcatid=19052
I have removed the biowheel and and put rubble in that section and the trays are currently empty. Should I load these up with carbon btw?
The sump says max flow is 700 gph. Which return pump should I go with?
I need a silent pump as well as the display is in the living room. I heard that the Eheims are the quietest. Can anyone confirm this?
Thanks for the input, it's appreciated as always.