I want to upgrade and I was wondering should I upgrade now from my 2.2 Pentium 4 to a 3.2 Northwood and a P875 motherboard ? Or should I wait for the 975 Alderwood ,DDR 2, PCI-E Video Card and get a 3.2 Prescott instead ? Will the new systems make that much of a difference in speed ? I would also like a system with good overclock pontential.