Sharkman,
I am using the Coralife Lunar Pro fixture that has 4x65 PC that is sitting on 2" leggs. Even if you hang the fixture, you will probably still need at least 2" of space between the top of the tank and your fixture. I don't think that it would be a good idea to place a fixture directly on the tank.
Do you happen to know the dimensions of the tank? I saw a seaclear 125 that was 72"x18"x20, thats where I got the 20" high note. I really think that you would be ok for a lot of corals with the 96w PC lighting.
But yes, for an annenome, a MH would probably be better. If I am not mistaken, most annenome's do perfer to hang out near the substrate. The problem is that you can place the corals where you want them to be, but annenome's move about in the tank and you really want to make sure that there is enough light whever it may go.
HTH
John