Lately, I've been using the BeB The Blacks and enjoying the hell out of them. I got some multicolored pads for earbuds and have been having a lot of fun with them. Out of the fiio e11, the bass is very smooth. Its definitely better bass than the 9wave for example, but the BeB mids and Highs are less clear and the stage is smaller.
But man, the BeBs are like $20 new, awesome bargain if you ask me. As for burn in, with earbuds its usually even more minimal than usual but with the MX980, the drivers are so large that odds are good it will require a bit more burn in. I am a firm believer in burn in and anything with a dynamic driver should learn to vibrate more. Much like a drum, if you know anything about drum covers. New and out of the box they might feel and sound a bit different than a few years down the road, but there is a psychological aspect to it all as well that is equally as important, much like ultrasones S logic, it takes some getting used to and once your ears realize what the hell is being piped into them, the stage opens up and the entire experience is noticeably different than the first listen