Yup, agreed. The Waveline can be either in-line or submersible, and if I'm not mistaken, can be speed controlled by an Apex or similar controller. Not sure how much or if any tweeking is necessary, but I've heard it can be done.
Just an FYI here's the flow chart for the DC 10000. You're going to be getting 1500-1700 gph or so if I extrapolated that properly. I'd probably reduce that by another 10-15% depending on piping and what not.
http://www.rlss.ca/#!dc-pump/vstc3=dc10000