Best processor and a motherboard with a combined budget between ($350 - $450)?

[tyonna]

The processor needs to be quad-core from Intel or AMD.

The motherboard must match the CPU and support the following technologies: PCIe with SLI or Crossfire technology, SATA II, USB, IEEE 1394 (Firewire), and DDR II or III.

 

[Andrew Henry]

Or you could head over to www.newegg.com and search for those exact specifications yourself.

Just a thought.