CPU: Can be replaced with Phenom II X4 or X6, if you're looking to reduce costs.
MOBO: Can be replaced with M5a88-V or any 880G motherboard if you're looking to reduce costs
CPU = Change it to GTX 560Ti, better performance and less cost.
HDD = OK
RAM = OK
DVD = OK
Case = OK
PSU = Can be replaced with 750W Corsair or OCZ ModXStream 700W