The bequiet! fans are great for most things. As rad/heatsink fans, they're okay, lacking static pressure that SP optimized fans offer, but at least they are super quiet. (Silent freak here)
No, because the radiator will act as an exhaust fan. That's why you put It in the back exhaust in the first place. And because of how water works, your CPU will stay nice and cool.
Depends on what games you play. MicroShuttering for both parties are pretty much gone at this point, its more about the SLI and xFire profiles and who gets those out faster that may make or break the deal. G-sync is good if you can't hit the 60 or 120-144Hz refresh rate of the monitor.
Isn't imperfection on the heatspreader a bad thing? :huh: Cus everyone always freaks out about having the shiniest heatsink plate, think that would apply to the headspreader too.
For single GPU having PCIE 3.0 or 2.0 have no performance difference whatsoever. But if you planing to do dual cards then you would need it, so it would have the bandwidth.
I'll try the new drivers when I get home. I should get some frame-pacing benchmarks for my xFire setup to see if the new drivers really make a difference.