Direct flow is good, but if its really strong they'll develop sweepers. Just make sure its not too strong, and possibly make it so the powerhead just glances along the top of it so it still moves with the flow but isn't being thrashed by it :P
If it is by itself sweepers won't really matter, but if its in the vicinity of other corals and is in strong laminar flow it could mean problems.
Display tank - 24g nano w/ softies/montipora
I run electrical appliances underwater and enjoy injecting things with Kalk filled syringes.