i do not think anyone in this hobby is ever satisfied with the size of their tank. Lets face it, we all dream of bigger tanks. One of the best things about this hobby is that is ever evolving, I don't think I will ever "finish" setting up my tank. I have helped several friends start aquariums and my advice is always to over-build your first system. This just means buying filters, skimmers, heaters, pumps, etc, that are actually rated for tanks bigger then the one they are starting. That way when they decide they want a bigger tank (and they always do) the cost will not be as great because they can use a lot of their exsisting equipment. form a fish's point of view, bigger is always better.