Reeflo Snapper. Does 1900 GPH at 4' Head and you can get one for $200. Watt draw is 110. I got one used and it hums a bit, but I've heard that the brand new one's are virtually silent. But these are exclusively external pumps (not submersible).
I've also heard good things about Mag Drive's but I've never owned one. Those are more versatile; you can operate them externally (in line) or submerged. But the Mag 1800 does draw 145 watts, so it's not as energy efficient as the reeflo.
What are you using the pump for?