I'm not trying to talk you into the WS - but they don't take any room in the tank, in most applications they take much less. They can also handle eductors/penductors. Just imagine having one ___ductor turning 180 across your tank. Its like having 20 of them that fire in sequence. Plus they are ajustable, you can move the WS all over your tank, and aim it anywhere you want. It's pretty cool, I have the 6100 on one, and I'm trying to decide if I want the sump return on the other. Best part is the versatility and no drilling. I have to get a vid of mine, its really incredible.
For the record I have seen several eductors in person and have never really been impressed. I'm not sure what pumps were driving them though. They did provide a wider path, but I didn't think the flow was anywhere near the multiple they claim. Just make sure you do it right so you don't have to relace your pump or your plumbing later.