Have you looked at the Eheim Aquastyle? It's a little more but has a better light than the Aqueon and it's glass. It's also a solid 4g/6g/9g since there's no "sump" section. Personally I don't see the advantage of going with an acrylic tank of that size. More pain than it's worth. I could see the plant substrate scratching it up. Just my .02. I'd go with a fluval over the Aqueon unless you really need to hit a price point...and if that's an issue I'd save up more, lol.
On a side not the Ecoxotic is nice too, but it only comes in 5g.