I would go for the Acrylic. It just sounds easier to me. Much cheaper too. I don't think that you need a table saw to cut the Acrylic either. Depending on how thick the material is that you are using, you could get away with scoring it along a straight edge and folding it along the line. This will give you a straight cut and you should only need a little sanding to then clean it up.
Or have you thought of using another aquarium to construct the fuge and sump in?
Either way, if you look through the pages in the DIY
forum you will find threads on how to do both of these.