smids said:IIRC Conroe will work on Intel 975 chipsets so perhaps going dirt cheap isn't the best idea - as then you will be able to get the new batch of processors along with a very good chipset - however someone correct me if I am wrong.
EDIT: No, mobo manufacturers and Intel have screwed the consumer once again
Future proofing isn't a concern as its no real money saver IMO. Sell the old stuff and get the next great bang for buck on the trailing rather than bleeding edge of technology. I think it makes more sense to do that.