Pros: Clear defined mids and highs, smooth bass, lightweight, durable ceramic
Cons: Higher microphonics than average
I managed to find these $200 off retail (Canada). They are great IEMs but i believe the $300 tag is a bit high for Canadian buyers, I believe these can compete with earbuds around the $150-$200 range.
They have an excellent signature, with the mids really coming forward. They have a good bass presence, one which is very smooth as opposed to punchy.
The x7i's do an a good job of noise cancellation, and have 3 single flange tips, and 2 double making it very accessible for people to find a good seal. The ceramic heads feel very durable, and make them quite lightweight. The flat cord does seem to give off more than the average amount of microphonics though which can be annoying at some times if you are not using the clothing clip.