I do have the EV240 already, so I'll start out with that and see how it goes. Ultimately, it comes down to bio-load and I plan to take it easy at first anyway. I was thinking the same thing with the feed pump though. I have the output pretty choked off to get the water level in the tube where I want it while running it on a Mag 12, so I'd like to do something bigger. They recommend an Iwaki 40 now which is one I was also considering for a main return pump, so I was thinking about grabbing one of those and trying it on the return. If it works well (I'm not really betting on it), I'll leave it there and may get another for the skimmer. If it doesn't cut it as a return, I'll just move it to the skimmer and get a 50 or 70 for the return.