Thinking about uprgading filter?

I'm right here with you. I tok have a 20 gallon aquarium. I wanted a canister filter but they're so expensive and I guess that polished look they give to the water is pretty awesome. But I stayed pretty standard. I got this http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=3610 Now it's no canister filter but I feel like it really does polish my water and give it that look as though there's no water there. I got the one that's for 20+ gallon and it works really really well. But if you want to spend the money get a canister filter. Or get this which is the next best thing.