You saw my 120 already. I prefer the larger tanks, but still have a place for smaller tanks as well. I kept a 30g at my office for quite some time. It is more expensive to maintain and set up a larger tank. What I have witnessed though is some folks set up a small tank and are not happy with it then want to scrap it and go bigger or they have one smaller tank and then add more smaller tanks. Why not just go big to begin with?