Yeah, I have the XB-910's and they're supposed to be the same headphones as the X10's. I like them a lot, and the bass is pretty epic. Also, I know what you mean by not being able to listen to other headphones in the same light.
That being said, the UE6000's are very good bass headphones and better than the XB's in terms of overall sound quality. I'm really torn between the D2000 vs UE6000; they both have their trade-offs and strengths, and I have a hard time prioritizing any of them. The D2000 are more "open", but also "slow", or something -- they don't really fit fast paced music all that well imo. I also have the Denon D400*, C300 and C400 on the way as well as the Sony XB90ex's. It's going to be a fun time trying to sort all of them out in an understandable manner. I will however keep you guys updated on my impressions.
* I know some people on head-fi are putting out very negative words on these, but I'm fairly skeptical that those words are exactly "unbiased" -- the mob mentality around these forums is quite out of hand at times with all kinds of exaggerations and yeah, well, you know that silly story... As a result I've stopped listening to most head-fiers about headphones, but that's another story for another thread.
Are you referring to the Logitech UE6000?! I would have never thought of a Logitech being good for music as I though they were more like gaming stuff but good to know. And the price is great too. I would love to hear your opinion about them compared to the 910 to get an idea of how they compare to the X10s.
Yeah its fairly easy to tell the fanboy/elitist comments based on ZERO experience with the product vs the honest opinions around here so I am doing the same thing these days..just when looking for recommendations. :)
Good luck and keep up posted! :)