Well, if I can get it under the stand, I'd like to go with a 55g sump. I might add a compartment for some macro + LR. However, if I do that, I'd just run a tee off the return to the fuge part for lower gph.
As far as eductors, do a search. It seems to me they're just a plastic nozzel at the ends of your return lines that kinda act like Seio's in the way they disperse flow. I also read they can double to triple the output from a pump. I've seen a couple DIY ones, but i've got more to learn about them.