All of the LGA 775 Core 2 Quads will work with your board, and those are probably the best you can get.
It will not support i7 CPU since it uses different socket. Your motherboard socket is LGA 775 and the highest CPU you can get is Core 2 Duo and Core 2 Quad with a maximum front side bus speed of 1333 MHz.
Thank you for you time and help
No problem, I'm here for that, sir ! Remember to pick your solution.