Go for sandy bridge when it's released next year. It takes a p67 motherboard; newegg has one that I know of made by asrock. Sell your old stuff now if you get any good offers, and use a spare pc if you have one. DDr3 isn't much faster with 775 cpus; not worth spending the money on. But I would order 8 gb now before the price goes up. Fry's and newegg have 4x2gb kits of 1333 ddr3 for $99.99 right now. I don't think prices will drop much more; they may rise next year.