downgrading from a dart

[addicted2reefin]

I have a reeflo dart pump on my 75 right now. I am debating selling it. What would be a good option for an external pump, possibably internal. internal i would go eheim. im looking for a QUIET efficent external pump. I want around 500 gph to the tank, and run a external skimmer and a few media reactors.