I have a 72" x 30 x 24h sump made from acrylic.
And a 72 x 32 x 32 DT being made with starfire glass.
Acrylic was cheaper to make the tank until a certain size, then glass (even going starfire) becomes cheaper. And then once you get really big you are pretty much limited to acrylic.
The glass tank is retarded heavy, but really, how often do you move this stuff people? The starfire looks nicer, and the sump even only being 24 high and thicker than the starfire by 25-30% still bows noticeably, if the glass tank does bow, my straight edge can not tell.
Something that will make a hardly noticeable scratch in glass will leave a gouge in acrylic.
And to whoever said a glass tank wouldn't survive an earthquake, but an acrylic would.... I'd call bs on that. A glass tank can self support, so if the stand tweaks you are still good with glass, acrylic will twist with the sand, past the breaking point... I'm not sure.
For the simple fact that glass is harder to scratch is why I would go glass.
I've never, NEVER seen an acrylic tank where I couldn't see scratches. Even the tiny ones you can not see stand out like crazy since the scratch is the first place for algae to show.