Greetings from Jamaica.
I had a chance to audition the IE80 (along with a few others) in a quiet airport store.
I really don't mean to make this sound like a snuff job, but I quite frankly wasn't impressed by it. The first thing I noticed was the thick mid-bass veil over the sound. The IEMs weren't even that bassy, but it still managed to cover up everything in the lower mids. The other thing I noticed was a lack of refinement in comparison to everything else I listened to. The W4, ASG-1, and HF3 (awesome little thing, btw) all sounded a tier or two above it in SQ. I had to double check that I was using the IE80, and not the IE8. The sales clerk must have seen the look on my face, because he walked over and turned up the bass dial to the max. I was expecting the bass to rattle my brain out, but there was (at max) a 2-3db increase in the bass.
To be honest, I think I prefer the older IE8 to the IE80. Maybe the IE8 I had was fully burned in, if you believe in such a thing. I also find the GR07 to be a better IEM than the IE80, FWIW.