for a tank less than 24" (probably your's, how deep is your's anyway?) you should have about 300 W (for 5.5 WPG) and you should be all-set for the corals you want to keep.
BTW I have a mini-reef (20g) and I have a PC (65W) and a flourescent (15W) so I got 4 WPG on a 15" deep tank. I have a xenia,
striped mushroom, starburst polyp. I wanted a flowerpot but found out that it's an LPS (guy at LFS said it would be fine under medium lighting and water-flow, I don't know), would it still do fine? If not, I could bump it up to 2 PC's and 6.5 WPG that would be perfect, right?
(just checking)