i'd prefer a64 , if you want to upgrade your pentium D you'll go through hell with intels requirements for a new chipset for every new set of processors , so the next batch of Pentium D's though socket 775 will need a new mobo... Also i hear that intel chipsets have low level digital rights management built in so it will make it more frustrating to rip music /dvds, download files etc. (but it can be hacked )