Your tank is looking awesome! I can't say what to put up there, but definately something that fits the current and light profile. I have some pieces that only colour up awesome when they are right up.. There's a particular acro which I have seen a lot of frags of. I think I got my from wendell or mark (same frags anyways). Here's a pic.. I believe it's a. abrolhosensis. Also, I think milis would do great up there.. As long as current isn't too strong.
I have seen this stuff almost solid blue in super high light..[/img]