I can never decide whether I like the acrylic or not. It's sure more sturdy than glass, which is good if you're planning to move the tank every few years. It's also nice and light, which means you don't need a team of six people to carry a large tank.
The scratching can be a pain. With coraline, it's really hard to get off without scratching occasionally. The good thing is that you can buff out those scratches. It's a bit of work, but it can be done.
Acrylic is also nice for that "rimless" look.
If you go with glass cages, you might want to get a Euro-braced tank.
Definitely get a RR tank. "Friends don't let friends do a HOB overflow."