Thank you eric for your thoughts. Thankfully I'm not crazy in hearing what I have been.
I have the M500's on my head right now and it doesn't wow me like the M200's. I hear the treble like eric does and it's not sibilant but close. The bass doesn't reach as deep but it's tighter and faster sounding. Might be a little more on the neutral side than the M200's. Comfort is incredible for an on ear and it's tiny. Only problem could be heat from the pads. Stage isn't as grand as the M200's but still quite good for an on ear. It still is a very good sounding headphone and deserves a top recommendation in the headphone/on ear category but the M200's are the find of the year.
I'm sure glad I have you guys on my ignore list right now. I just can't seem to see any of what you are typing. Oh well.