I would not want to run Gigabit on ANYTHING other than fiber. Cat6 will handle it (supposedly) but that too will eventually be filled up.
My first mentor in this industry was a sound engineer for NASA shuttle flights in Houston....he explained it to me this way, which I have used on MANY customers, and a boss or two!
Think of wire as a means of carrying water....
A Single Cat5e can carry as much data (water) as a fully pressureized one inch garden hose....
A single RG-6 can carry as much data (water) as a fully pressureized 4 inch fire hose...
A single strand of fiber (most bundled cabling today has TWO strands) can carry as much data (water) as a fully pressureized (God help us) 12 FOOT Culvert...
I don't know yet where a Cat6 would fit into this analogy, but I think it's right around the fire hose...it still ain't touchin the culvert....
This could all be bull, but he was an engineer who studied these things, so I had to take it on face value...I do know I've run things on fiber that made Cat5e fall over and die...
avdude
AVDUDE "It might work better if it were plugged in and programmed first...just a thought!"