I'm glad someone mentioned those Maxjet pumps. Here's a url of the pumps I found.
http://www.fishgallery.com/pos/categories/107.html
They list 2 pumps, ones the maxijet the other is the mini jet thats smaller and has an adjustable flow rate.
I was thinking of getting the minijet606 that sports a maximum 153gph.
Anyone have any thoughts?