Q. I was thinking a intel e6600 2.4 ghz 1066 fsh but I have now seen Q6600 Qaud core is it worth the extra money ?

YES!

Q. What version of vista do I need 32 bit or 64 bit or does that depend on which of the above prosessor I choose?

32-bit unless you have some specific reason for 64-bit. More drivers and hardware supported. The larger address space is only required for apps like huge databases. Most multimedia drivers are not optimized for 64-bit yet from what I have heard from MS.

Q. I was thinking of getting ndiva 8600 gts because I have been told has good outputs I dont play any games on the PC That is what the x box is for.

That should be fine.

Q. I was going to get 2048 ram memory 667 some places offer 800 does this make much difference?

Get at least 2 GB. 32-bit won't see a full 4 GB but if it's in your budget, go for it.

BTW, with Vista, Media Center only works with analog TV and broadcast HD in the US unless you purchase a complete system from a certified MC OEM.