the NH-D14 is one of the top air coolers available now. Depending on price and availability you have two options for TOP notch air coolers.
the NH-D14 or Thermalright Silver Arrow SB-E
The Thermalright is better but I believe costs quite a bit more than the Noctua.
You can't go wrong with either, so if you're thinking the Noctua, check prices on the Thermalright and go from there.