jsc, thank you. It was my understanding that the OEM Vista on my existing HD might not work if I changed to the different style Motherboard. But, I am planning to install W7. I have lined up the new Motherboard and 2 extra Gs of RAM (I already have 2 Gs) and based on your advice, I am going with Win7-64.
I need to replace/upgrade the Power Supply while I'm at it. What do you recommend - would 500 or 600 Watts be enough?