I guess it just comes down to whether I want to wait it out for the Senns or scoop up the AKG since they are available now. That's a hard decision because I'm really not very good at waiting. As it is I timed my decision perfectly and only had to wait a couple of months and since I live with Song Towers and have all of my other cans to play with it wasn't that much of a sacrifice to wait a couple of months for the HD6XXs that I've been lusting over for a decade. :D Anyway, headphones are such a personal taste thing that it comes down to which sound signature that you prefer. My wonderful RBH cans make for really great music inside your head, but when I have time for critical listing I love a wide and detailed sound stage that no closed back headphone that I've ever tested has produced. When I'm in the mood for Klipsch-like, slightly piercing but bloody detailed highs and solid base on the go my VMODA Crossfade IIs BTs are just the ticket. Then again, when I'm in the mood to just veg out for hours to detailed jazz, new age, or Mozart I find comfort in the Massdrop/Senn HD6XX. Having never tried the AKG and not knowing your taste I have no idea which is the best choice for you, I'd just study up on their sound signatures and decide for yourself which is the best fit for you. Is there anywhere near you that you can try out both? BTW replying to this post forced me to spend a couple of hours listening to favorites with my HD6xx which I really needed. :D