I'll post a few mockups once I have all of my plumbing pieces. I also plan to fill the tank with water and run the returns inside the tank to see what kind of water movement I get depending on where they are.
I bought 2 of these http://www.marinedepot.com/ps_ViewItem.aspx?idProduct=AZ21461&child=AZ21461
So I need to know how they push the water at different depths etc. I dont want the swirling water to be too high and cause it to spray or splash, yet high enough that it wont siphon my whole tank if something should go wrong with the pump.
If, as was suggested somewhere above, you did make small semi-decorative 'beams' up the side to hide the plumbing, you could create a small acrylic 'cap' or overhang to go above the plumbing fixtures you mentioned to help contain any vertical splashes.
