Some Pros & cons of each:
Acrylic: Lighter, stronger, easily drilled, clearer, scratches very easily and harder to remove algae
Glass: Heavier, harder to drill, not as clear (unless using Starphire glass), stands up to scratches and scraping of algae without any major issues.
Personally I'd go with glass, starphire if you can afford it (clearer than regular glass). Get the tank drilled by your LFS and get a buddy to help you move it. I'm pretty tough on the algae cleaning.