WTB: Return pump - 300-400 GPH at 4 feet [EDM]

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It looks like I need a beefier pump for my tank, the Mag Drive model 2 it came with just isn't cutting it and after looking at the specs I can understand why

I'm looking for something to replace it and I'd like to see at least 300 GPH at a 4 foot head but if I can get something stronger, so much the better.

If no one's got anything kicking around used perhaps you can tell me whether the Marineland NJ-3000 submersible utility pump is a good choice?

Thanks!