Looks like we're just at different experiences. I know the A16 is supposed to be king for 3D audio with headphone experience. Back when I was trying to get a good surround sound experience with headphones, it wound up being in college when I got a Sennheiser HD-580 that also included their pro-logic surround processor. It's only calibration was manually dialing things like "parametric" until it sounded good. But dang it, when I listened to The Matrix on it with the headphones, I could hear Neo swish kicking his legs behind me. I got into head-fi for just listening to music and then continued to speakers for movies. After I got a HD plasma TV, eventually got into blu-ray and HDMI 7.1 speaker system (and I can now have a cinema experience without alarming neighbors). What was funny was the girl I was dating at the time first said "wow, your speakers are big and ugly". But after she watched a movie on it-"wow, this sounds better than a movie theater". While I'm sure the A16 is still one of the best things for 3D audio with headphones, there's also an experience of watching live concert blu-rays with a group with surround sound speakers. For example, I gave an extra surround receiver to a friend, along with a pair of bookshelf speakers. He had a gathering at the time of me gifting this stuff. It was hard to run calibration tones with running kids....but after I got past that, I put on the first Eric Clapton's Crossroad's blu-ray. The segment with Midnight in Harlem (Derek Trucks and Susan Tedeschi) really highlights the range of vocals with surround and bass with subwoofer. Because I now also watch all my video content with my now current 3D audio speaker setup, spatial audio for headphones still don't interest me. Honestly, currently the main regular headphones I listen to every day is running with open air earbuds in that I'm not looking for great audio quality.