I have a 72gal bow AGA, and it is indeed hard to convert these tanks over to FOWLR and reef due to the lighting issue. I am in the process of having a canopy custom built now to accomodate the "bow", however, before doing this, I contacted AGA...they said that they do not make the bow canopy because it was too costly for them to do so. They told me that Oceanic makes the bow canopy but that it was made of formica, not wood. Well, I have the AGA pine wood stand, so I didn't want a formica top.
I'll let you all know how the canopy works out as soon as its delievered.
Also, if I had it to do over again, I'd get a reg. rectanglar aquarium. The 72gal bow is more like the size of a 55gal rectanglar and, if you ask me, the bow front glass is not as clear looking as the straight front glass of reg aquariums. .