I have a 10g rimless glass tank (my ghetto nano) that I got off eBay. It came with PC light, power filter and air pump that run off 12VDC through a transformer... touted as being child safe.
It's been up and running over a year without any problems. On the back is hanging an AC70 fuge and resting on top is a 96w quad Coralife fixture. I'm anal enough to check the seams for separation almost every day, and so far, there are no leaks anywhere.
Now this is a cheap Chinese-made AGA knockoff that I have, I'm sure a real AGA is even better built. If you can cleanly remove the plastic rim without damaging the side joints, I can't see where you'd have any problems.
Just my 2¢