I'm wanting to upgrade to a 180 g tank, but don't know which to get. If I go glass, I'd be able to get it very soon, because it is cheap, but I've heard it affects how you see everything in the tank, and it can crack easily. If I go acrylic, it is a lot stronger, but I'd have to wait quiet a while to be able to afford it, plus it can scratch easier. Opinions?