I would take the Antec 300 over it. Last I checked, the sonata III was priced at $100 including PSU. The 300 is a better case with better cooling and priced at $50. If your system does not need a lot of power or output a lot of heat, the sonata II is a good option because it comes with a good quality power supply. However, you would be better off in most cases with the additional cooling the antec 300 could provide along with purchasing a seperate power supply.