[ca1ore]

I run a large tank from a basement sump; have done in two houses now going back almost 25 years. In that time I have used Iwaki, Panworld, Dolphin and Reeflo. In fact, I would judge them in that order. Had all sorts of problems with the reeflo, none with the Iwaki which ran for me for almost 20 year continuously. For 'normal' sized tanks (i.e. not thousands of gallons) it's hard to go wrong with Iwaki or Panworld. They handle pressure well as long as you are smart about your plumbing choices. While something like the Abyzz looks cool, the price tag is absurd and quick math shows that you'll never get it back in energy savings.