I buy small nanos from my LFS. They have a 2 gallon that has the same footprint as a Aqueon 2.5 but shorter. But I agree, it depends on what you are looking for. I don't mind have rimmed tanks as long as they look nice and fit all that I need. Some people wanted only rimless nanos. Personally, I like the aquarium masters tanks (or glass masters?). They are cheap, clean with black silicone, and nicely made. Cost me 20 for tank, lid, and dividers.