i'm sure many here have experience with both or have just chosen one over the other. Are there members here assuming you could afford either in terms of space or finances larger tanks versus smaller, if having to choose between the two would get smaller sized or nano tanks instead? Why? to me the great advantage of large tanks are being able to have species like tang in a couple other large species. Me personally, a Tang is not a deal breaker for an aquarium; but everybody has their own flavor and I'm just curious regarding those who have more swayed towards the medium or smaller nanos and not just because of money or space and why.