If you're going to pick up another motherboard then I'd go for the one with the faster bus speed. But if you're going to use that 1 ghz processor with it, you may have to change the resistor settings on it. Right now it's set to run at 7.5 times bus speed. With the faster bus speed it'll try to run at 1.25 ghz which it may or may not do depending on your luck.