FashiI've heard about balance issues on the Havi B3. Head Fi recommended the ath-im50 or 70 line over these cor the low end. The reviews for the kc06a look good though. I doubt there would be a big difference.
jokaankitIM50 is much better, I have Havi, Ostry KC06a and IM50... Havi definitely has that wide sound stage going on, Ostry is in your face IEM, IMO fatiguing at times and IM50 is just warm and has a good bass and mids
jokaankitooh, once you received them, you'll love it! I do have Creative Aurvana IE3 and it's a midcentric IEM but I love it as well, my fave is IM50 and Aurvana IE3, love the separation in them....