I have a 75 AGA with an over-flow. The only problem, which may not be one for you, is that the bottom pane has a slow leak. Its really only been used for like 6 months, but I think it wasn't sealed properly. Used it as a reef for that time frame, then it started leaking so I upgraded and left this one in my basement... It would be a project, but if you were interested it wouldn't be too hard to reseal......
Chris