My M3's fit my ears perfectly with the stock tips. I was worried about that, because by looking at the design, you could tell that they would be limited on depth insertion. No problems at all, a great fit.
Hey guys. Here's a review I did at MP4Nation. It's not as detailed as some of your impressions, but I think we're all agreeing in what these sound like. Take into consideration that I did this review straight out of the box. No burn in time at all. The M3's are awesome! Really liking them: http://www.mp4nation.net/forum/viewtopic.php?f=1&t=20219