Motherboard, CPU, RAM and $400 USD

Well, Intel have been doing it for the last 4 years or so, but I think AMD have just made a few boo-boos. 754 was a mistake. It was intended to be the desktop socket while 940 was the server socket. Everyone wanted their extra bandwidth, so 939 was created. But it can’t support DDR2, and I think the socket needs an extra pin for that, so we have M2. (Note: last sentence is completely non-authoritative.)

Hooray for double posts.

So, what’s the take on the current CPU lines? Is FX really worth it over the 64? What’s this M2? Has Intel finally made a chip worthwhile?