Lighting Solution . . . Please!

Okay here's my problem, I really want to upgrade my current lighting setup to include MH HQI. The problem is that I don't have a hood so I need a fixture, but I don't think I'll be able to use a fixture because of the odd shape of my tank. It's a 36 gallon flatback hex (pictures are included here). Solutions? I was thinking of getting an outer orbit or coralife hqi fixture w/ dual pc bulbs.

If I do that I'll have to hang them from the ceiling, but I'm a little nervous about the weight (I live an apartment and it will have to be installed in a drywall ceiling, the one with the little nipples everywhere.

Should I just get a hood and install a retrofit kit on it. At this point that seems like the best solution, but will it be more expensive then just buying a fixture and hanging it. Does anyone have a fixture such as I described above hanging over their tank. What do you guys think?
 
If you got the small 150w pendants by Aqua Medic, you could have the MH light you want. They may have a 36" long fixture with two bulbs, but I don't know for sure. I'm talking about this one:

eyelevel_front.jpg
alt="">
 
Top