alt Hacker NewsI have ten gigabits throughout most of my house, and you're right: copper is not happy pushing ten gigs.
My 10 gigabit thunderbolt dongle weighs about a pound, and I think 90+% of that weight is just heatsink. If I've had it plugged in for awhile, if I accidentally touch that dongle it actually hurts because it's so hot. I cannot image that much heat is good for, well, anything.
I have another Thunderbolt dongle that has an SFP+ module, so I ran a fiber line from my switch to my computer, and that runs considerably cooler. That's what I use nowadays.
What standard of cable? When I rewired I ran Cat6a everywhere. My longest 10G run is ~70 meters and works just fine. Anytime I had a link issue it was because I did not do the best job in termination on the keystone jack.
To be clear the Cat6a is thicker than Cat6 and harder to work with. It makes termination a bit more tricky.