I bought the X10 on Black Friday for $85 but decided to return the X10 because it doesn't suite my needs. The X10 cannot be worn over the ears; therefore, X10 will have more cable noise and fall off easier. The earbuds go deep into the ear and provide a really good seal. I do admit that they are very light and powerful for such small earphones. If I were to keep them, probably strictly for Dance and Techno music and such without vocal, but it's such a hassle to carry around more than one set of earphones.
The physical features aren't important IMO. What I don't like about them are the bass that drowned out the vocal. If you appreciate the vocal and love to listen to the singers' voice, then I would consider something with less bass output.
Under $150, you quite a few options: DUNU 3C-S, R-50 by Rock-it, HiFiMan RE262, Creative Aurvana 3, Yamaha EPH-100SL, Logitech Ultimate Ears 700, Phiaton PS 200 was price at $105 a few days ago at Amazon.com, and last but not least the MEElectronics A161P.
Despite of what people say about the HiFiMan RE262 having weak bass. They do actually put out a lot of bass. Not as much as the X10, but definitely more than the older Shure SE series. I did some more burn-in on my new RE262, they sound slightly better and I'm starting to feel attached to them because they do pretty well overall in R&B, Rocks, Country, POP, RAP, Dance, and etc..., IMO. My only dislike about the RE272 are the TRRS modular plug and they don't sound as good as the Shure SE530 in the vocal, but that's because I expect to much from a set of earphones that cost $119 compared to the SE530, $499.