I have the Flightcomm 5DX. I like the way it sounds and the sensitivity of the mic. At first, the headset fit too tightly on my head, causing headaches on any flights over a few hours. However, with more use, they've been "broken in" and loosened up a bit, and now they fit nicely without any discomfort. For the price, I would recommend the Flightcomms. I honestly can't tell any significant advantage in the DC in sound or comfort. Many pilots pay more just for the DC name.
Also, I would stay away from ANR (active noise reduction) headsets for general aviation use. They are expensive, and they may cause you to not notice a degredation of engine performance at a critical moment.