I see the need to go ADA. I've seen those aquatop tanks, they are not as nice and clean looking as ADA.
An eheim 2211 is the best filter there is in its size.
What a lot of you are missing is that the price does not matter. We are concerned with aesthetics. We are willing to pay a few extra dollars to get the best. Why get a good looking/functional tank and equipment when we can have the best looking/functional tank and equipment available.
You may be ok with the all in one kits, but I despise those ugly cheap things.
Like the genius just said, it's a matter of preference. I prefer to have the nicest nano available.
If I wanted a reef I would do a reef, but I don't want a reef.