I'm sure others will chime in on this but I think (For coral) you would want as much flow as you can get without blowing away your inhabitants, stressing them out or blowing sand around. I think it's most important to avoid places of low current so that you don't end up with traps for detritus that can become nitrate producers. Wave makers and tidal current simulators can help in that, (properly set up) they usually create turbulence and shifting flows that help clean out the pockets of still water. If your looking for precise numbers, I don't have the expertise for that. Your tanks are already looking really good and with a little research, I'm sure you'll get a feel for what your specific needs are.
Tom
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