Linuxury

Well...that's that.

Id go witht eh first one just cause it has more cores and for a little more future proofing you want to be safe in the long run. When new console come out in x86 base cpu there gunna start using more cores and your gonna benefit more from it. And also amd motherboards are usually more decked out on function compared to Intel.

I went to a meeting for information on fiber installations, and half of it was spent talking about how easy it is to damage fiber connectors... so I'd go with Cat6a.
 
We had a JDSU rep there who showed you only had to plug it in 2-3 times without scope/cleaning it and the dust particles would break up small enough to completely destroy the tip of the fiber. Plugging it in once with a tiny bit of dust was enough to damage it to the point it did not pass specifications, even after cleaning.