Anemones are really tough to keep with corals, since they will creep over the top of your corals, and sting some too. If you really want to keep an anemone, consider keeping a tank with one or even several nice anemones and some clownfish. A 58 gallon tank would be a nice anemone tank. Once the anemones settle, you'll have a really cool tank. Anemones need some really good lighing, and I suggest Metal Halide.
Good luck,
Sonny