Okay I just got the MA900 in today, and wow...light as a feather and it has a really impressive and rich sound. The bass has nice impact for an open headphone. I am not saying it's the best headphone I've heard from a technical standpoint but it's a great value at the $225 I paid for them. It might be harder to justify keeping the K712 I recently bought.
I agree with you, i've had these for a while and they sound great but I accidentally bent the jack so need to get it fixed and I am really missing these now. The comfort is second to none and I find a lot of other headphones unbearable to wear now.
Edited by DeadWaves - 1/27/16 at 5:03am