I love Amd64 too....this is why im making the switch to them...couse intel overheat and all that amd is much better for gaming/multitasking and the chips wont get as hot as intel ones now and days...
I've had both, AMD64 and Intel. I'm running Intel in my lappy. Game performance and etc is near the same. The AMD64 machine would bench more though. I burn a lot of stuff and rip/encode and Intel is great for that. Using applications on my Intel rig seems snapier. Both are great chips though.