So I got them yesterday.
Right out of the box, the phones had the standard single flange tip installed. I gave them a try and was not impressed with the sound...it was very metallic and had next to no bass. I must have not getting the right amount of seal, so I went straight for the large bi-flange tips.
Woah. There it is. The sound i was looking for. And man was it good. My last IEM was a pair of Sharp HP-MD33s and these are just on a higher level. Music separation is amazing, and i didn't feel the bass was lacking. All this was prior to any burn-in.
After a 12 hour over night burn-in, the sound is def coming together. Bass got a better and more present, but doesn't overcloud the spectrum, mids are smooth and the clarity! mmmmm

. These large bi-flange tips are awesome, and provides great seal. I am genuinely satisfied.