I can see the recommendation of all of those except for the xenia corals. My reasoning is that they grow TOO well...so well in fact that they become invasive and will take over a tank (same is true with pocillopora btw). Perhaps instead of the xenia you could recommend something like a candy cane coral, blasto, or some other hardy LPS. If you really want to stick to a softy for recommendation, I'd suggest a toadstool or leather coral of some kind (maybe a sinularia).