What is over all better the k6-2 550 or a k6-2+ at 450.Its on an Asus P5A-B (at motherboard)with a k6-2 300 currently. I told him to upgrade the motherboard and case but that will be out of his budget.I do plan to overclock the CPU to as close to 600 as i can get. I can get both for around $35.