I currently own a stock pc bought from a local retailer about 2 years ago.it has a pent 4 3.0gh processor and agp gfx slot.Im thinking about going down the core 2 duo and pci-e route.2 questions 1...will there be any problems dropping a new motherboard with the formentioned upgrades in it ,if not any good motherboard recommendations(up to £120) any advice extremely welcolmed thx.