Advice on powerheads and placement

[George]

You can get a couple of Hydor Koralia 3 (or HK evolution 750 they call now), placing them on the opposite sides of short end of the tank (the end with SPS), pointing them at each other and blasting away. The point is to create some turbulent, not one directional flow.
On the other end, you could do the same with some smaller power heads like evolution nano 425.
It's tough to mix SPS with soft corals and stuff like Xenia in terms of balancing flow. Getting more than one power head can help you playing with direction and flow, etc.