Bitmap Frogs
Mr. Community
They are absolutely worth that price for the sound quality you get, just at $295 MSRP, there are other phones out there that will definitely outperform them and at cheaper price points. I think the thing that bothers me the most about the X10 is its imaging isn't very good. They felt really claustrophobic from my memory, and I much prefer something with a larger soundstage. I think that has a lot to do with them being very, very small single driver phones. I think IEM tech has come a ways since the TF 10 and X10. But this is really me just nitpicking since I've heard better than the X10. At that price point, they are excellent phones and don't really have a peer. I'd just be a bit weary of the build quality. The straight jack is bound to short over the long run.
I should also mention that insertion depth plays a role in how good these phones sound. You have to be them deeper in the ear canal than you'd think, just like with Etymotics.
For 260 buckaroos you can get the beyerdinamics 990's which have a killer rep.