I had one of those, didn't like it. Even on the lowest volume setting, it blasted my ear off. Also, the wire inside the cord for the PTT kept breaking, had to repair it once, then I just gave up on it.
The Devgru headsets are really good quality. I have a Frogman model, the only thing I don't like about it is that it cuts off all other sound to that ear. Makes it impossible to hear somebody talking when they are standing to your side.
All the military guys use an Icom F4S Radio, and just about everybody here will recommend
www.reddogradios.com. From what I understand, if you order one from there, just let them know you want it programmed for AA channels (Airsoft Arizona) and they'll set it up for free.