So I bought a PX51 and a headset adapter because I really wanted to have a wireless surround sound setup. Hooked the headset base to the optical out on the X1 and the headset to the adapter via the included mobile cable. Changed the sound output on the console to bitstream.
Played about 2 hours of Titanfall and everything seemed to be working as expected. Was in a party with one other friend and he said I sounded fine. No popping or crackling at all on my end and I'm usually pretty sensitive to hearing things like that.
The only real issue was trying to find the right balance of sound/chat and with separate game and chat controls on both the headset and adapter, this a bit more cumbersome than expected. I am going to do some more thorough testing over the weekend before I decide whether or not to keep the headset, but the first impression was more or less positive.