New_Noob, make sure that you do plenty of research before getting an anemone. There is much conflicting information out there to sift through (MH is the minimum vs. MH is too bright, Feed them 2 - 3 times a week vs. Don't feed them at all vs. They will die from overfeeding, etc.). If the Anemone Police read this thread they would probably berate you for wanting to put one in a tank that lacks MH lighting and is only four months old. No one seems to know why they are so difficult to keep, but in a study of experienced reef keepers around 95% died before reaching 3 years in the aquarium, which is pretty pathetic considering they can live for hundreds of years in the wild. You should also consider corals for hosting, I've seen pics from members on this board with clowns hosting in toadstool leathers, GSP's, hairy mushrooms, and plate corals. If you do decide to get an anemone, make sure you get a healthy one. Obviously you can't do that if you get it online, but if you get one from the LFS, make sure it has good color and doesn't have much if any bleaching.
Also, you say it will be high in the tank, but trust me, the anemone will go wherever it pleases. I had to rearrange my rock work after it settled in the back.