The 80 gallon is 48x18x22 I believe. The same as the 72 gal. bow but, obviously all the way across. These are Island brand tanks which always seem to be slightly larger are smaller than the standard All-Glass sizes.
I thought the bowfront might look a little nicer in the living room than just a big rectangular box. I've never heard of distortion being an issue but, I've also never seen a picture of one taken at an angle. Also being wishy-washy on whether I'll miss the extra space of the 80 g. for plants and another fish or two!