My only complaint with my acrylic tanks is that scraping off the coraline is a royal pain! On a glass tank, you can just use a razor blade; acrylic tanks take a little more elbow grease
Three things really sold me on my acylic tanks: 1) They are darn hard to break; I have three kids and sometimes my living room looks like a cross between the WWF and the XFL (heh....we prolly got better ratings

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2) The clarity is fabulous! There are glass tanks out now called "Starfire" that are beautiful and rival the acrylic for clarity without the green tint of glass but they are pretty expensive. 3) Weight. Acrylic tanks weigh a heck of a lot less. I can heft the 125 acrylic by myself...try doing that with a glass tank!
It's a matter of personal preference though. If I were you I'd try to look at a few up-and-running tanks of each to help you make a decision. Of course, price is a factor, too.
HTH,
~Alice