MatthewK
100+ Head-Fier
Another vote for the RP-21 over the RP-22x. I owned both in the past, and the RP-22x wasn't THAT much more bass, but it did seem to be a little bit more muddy. The thing I didn't like about the RP-21/RP-22x in general was the microphonics (noise heard in the headphone from simply bumping the cord).