T-Mobile Sidekick 4G byGFLPraxisAug 25, 01:55 AMIn addition, Core 2 Duo vs Core Duo performance increase really isn't all that dramatic: http://anandtech.com/cpuchipsets/showdoc.aspx?i=2808 Certainly not worth buying one to upgrade your current Yonah machine, assuming that really would be possible without some sort of EFI update. While Merom isn't much faster than Yonah, Conroe in an iMac