Well today I received my Massdrop Sennheiser 6xx's and my wife said, "Oh those look nice can I try them out". Well, needless to say, I'm on the hunt for another pair of headphones. I'm glad she enjoys them so much. She always kind of shook her head when new gear would come in but now I think she is starting to understand and I may have created a monster and my wallet will be the one to suffer.
I was able listened to them for a little bit and they do sound really nice but don't want to use them too often as I don't want to loosen up the headband too much due to my melon sized head.
Now, I'm waiting for some Hifiman 4xx's as I don't want to wait until March to receive my own. These will be my first planar's and looking forward to hearing these. I've also been hearing some good reviews on these so hoping they will fit my sound profile. I think they will but one never really knows until they have been given a listen. God, I love this hobby.