What is the best processor for my motherboard

Get the x4 9750 Agena quad core for $79.99 with free shipping at newegg. For the heatsink, get the rosewill rcx-z1 for $14.99 with free shipping at the egg. It comes with an rpm adjuster if you like quiet fans. Your ecs board doesn't work with newer phenom II cpus. This is the best cpu by far for your board.