Welcome aboard Modell, thanks for taking the time to join and make an intro post, we appreciate that very much.
As for cameras, you'll want one that lets you adjust the white balance easily as that is definitely something that causes a lot of headaches when taking pics under those intense actinic blue spectrums. And it should also allow you to take some super macro shots. I am in the same boat as you, in need of a great camera, so I'm looking forward to the other replies this thread hopefully gets. If it's a weak response, perhaps consider creating another thread with a descriptive title so it stands out and attracts attention from those of our members who know about reef aquarium photography.
Well.. again, welcome aboard.. and hope you enjoy your stay.