So I received the M100s and although they did have decent bass, they just reminded me too much of a Bose sound signature, which I don't have a particular taste for as I feel they just go after the forward mids and somewhat bloated bass that caters to the masses. I also found them to be uncomfortable like the M50s and promptly returned them feeling like I just can't find what my ears want. They were just too "fun" for me to feel like they were serious listening cans.. and for that I already have the beats pros for when I'm going to my hockey games (yes, I am a gal and I play women's hockey) Got a problem with that? Talk to my man!!!
I had not sent my K267s back yet as there was something that kept me reaching for them when I was in the office and obviously away from my HD800s. I LOVE the sig of my JH13s but when at the office, I often have people stopping by and wanting to discuss projects and to keep removing and reinserting the in ears is just a PIA. This is the void I wanted to fill with the K267s and I have to say that despite the sub par build quality, I am going to keep them. After A/Bing them to the K550s in Best Buy and noticing that they still have that AKG sound that I enjoy but with a tad more bass, I just decided to keep them for what they are... no D7000/D5000/D2000 or HD800 or JH13 killer... but a portable can that I can enjoy either hooked up to my iPhone 5 or my MB Pro via my Dragonfly and Audirvana+ app with a more neutral sound sig than most cans in the same price range.
Do I think they are worth the $299 asking price? No... but for the meantime they'll fill the void nicely and I plan on shipping back to AKG to repair the issues mine had from a quality perspective right out of box.