Hi,
Sounds like we have almost the same tank, i have a 58 gallon Oceanic Show, i think it's the same dimensions.
I have some good feedback for you. On my tank, i went with a PFO acro light that had the Icecap 250watt hqi 10K and 2 - blue VHO's. It looks very nice, but i think it could use a little more.
On Jeremy's office tank, a 46 gallon bow. They went with 2x250watt and 2VHO's and it's really bright. He is all SPS, so his tank really needed that extra 250 light.
On my tank, the 1x250 and VHO's i think is going to be enough for a mixed tank, i'll put SPS and clams near the center and softies on the sides. So for mixed, the 1 halide is a good idea. I kinda of wish i would of went with 2x250 or 1x400 now though.
So for your tank, i would recommend either the 1x250 w/vho if you want a little bit of everything, or 2x250 w/vho if you want to concentrate more on sps and clams, still can have softies, but keep them lower in the tank.
thanks
jason