Well, the first fixture I linked for $109 is a good deal and not too much money so you wont' be going all out on it. I started with a 29g regular sw
tank and used the same fixture for a few months until I upgraded. It was easy to sell the setup since it had decent lights not to mention I used them for a few months and grew some really nice corals.
As far as your clowns hosting, they like flowy corals, like torches, leathers and just about anything else that sways and flow. BUT there is no guarantee that your clowns will host anything. I have 2 pairs and neither host anything.