IMO, the larger the tank the easier it is to take care of. The only negative is cost. More water, salt, chemicals, and equipment replacement costs (pumps, bulbs, etc).

If I have learned one thing from this hobby, its always better to put your money into equipment in the beginning than try to pump money into a tank afterwards. Every dollar you put into a tank in the beginning will pay for itself in the long run. I wish I had learned that lesson several thousand dollars ago.

Gary