|"A non-power user certainly doesn't need a 4-core or 6-core CPU."|
I know that, but I want him to have a fast computer and in 10 years it wont be "fast" anymore, but should still be functional. I am installing 8GB when 4 would be fine for now. I got a used 9600gt video card, which isn't great, but more than enough. If needed, in 3-5 years I'll pick up a used GTX 560 for $30 or so and he be fine.
Anyway, I am not worried about what he ends up with, he will be happy either way. The basic question is about me, if someone was going to give you a 955 BE & motherboard or a FX-6100 BE & motherboard (motherboards are similar quality) which one would you take.