Wow, didn't expect to get your reply so fast. Could you please elaborate more about 109 Pro's performance in guitar practicing setting, does the guitar tone (especially high gain one) sound good through them? I am about to put the trigger now, thank you very much!I like them a lot. Better than Sony MDR and Beyer DT-880. Very natural sounding and close to the sound from studio monitors. Some say there's (too) much top end, but I don't hear that (and my hearing is fine).