Overall I'm extremely happy with the GTX 680. It's even a little bit quieter than my GTX 295, which had a pretty quiet fan. Finally an upgrade of a significant jump for these NVIDIA GPUs.
* Huge performance boost over previous gens
* Smaller, 28nm fab means less wasted heat per watt
* Good reference cooler design, GPU cooler separate from spreader
* Airflow one-way, out back of case
* Nice, clean, minimalistic aesthetics
* EVGA backplate available form EVGA's site
* EVGA high-flow bracket available from EVGA's site
* 301.10 drives pretty good for release! Not mature yet though
* More control of settings than previous gen drivers
* Surround-gaming, triple monitor, 3+1 setups, etc
* Adaptive VSycn toggles VSync on/off to reduce stutter
* TXAA makes AA no longer huge performance hit, but games will have to support it (Support for TXAA: Unreal 4 engine, Mech Warrior Online, etc.).
Some benchmarking at 2560 x 1600 with max graphics settings, i7 920 @ 3.6GHz CPU, 12GB DDR31-600 RAM, EVGA X58 E758 board...
SWTOR Corellia 5min run FPS: 81 avg, 111 max, 43 min
SWTOR Korriban 5min run FPS: 106 avg, 112 max, 58 min
Heaven Benchmark v3.0 Extreme: 720 points, 28.6 avg FPS
Heaven Benchmark v3.0 Basic: 1605 points, 63.7 avg FPS
And 1920 x 1080...
Heaven Benchmark v3.0 Extreme: 1164 points, 46.2 avg FPS
Furmark 1.9.1 Preset Test: 2635 points, 43 avg FPS
Card runs a little cooler than my GTX 295 and a GTX 580, and a LOT cooler than a 480.