You are in for a treat based on my experience with the 339 driving my HD800S, and HD600. Great pairings and I miss that wonderful amp to this day. I also think it looks beautiful. Nothing in audio is more appealing to me than the look of tubes glowing in the dark while you chill to tunes. Ethereal experience to be sure, so miss that. Enjoy your 339 mate, you made a very good choice.