Don't forget about the new line of Maxijet Utility pumps. They can be used internally or externally, have a thermal protection switch to shut off if it overheats, and comes with a three year warranty. On top of that, they don't pull a lot of power. I did a review about them a few months ago. The warranty alone is a huge selling point to me.
http://www.reefaddicts.com/content.php/82-Equipment-of-the-Week-Maxijet-Premium-Utility-Pump