From what I understand there are minor differences in the tune with the 900s. Even the accessories are different. Sadly many eBay sellers like to pretend they're the same thing.

Why 4r and not w40?

But from what I was reading is that the Ultimate Ears sounded better than the Shure's and were better unamplified.

I'm back to square one. Was ready to bite te bullet on the Ultimate Ears 900s for my first pair of premium IEM's (before I had TripleFi 10's in mind) but I called Logitech tech support and he said that their earphone line is discontinued - only leftover stock. Warranty will be done with a coupon...

So I got off the phone with Logitech tech support and he said that their earphones are discontinued and it's just leftover stock. Warranty will be done with a coupon for another Logitech product. So what IEM's do I buy now? I was so set on the allrounder of the 900s.

Just one response? :(

I did find products such as the http://vampeo.com/ but I don't know for sure if this is even a real/reputable product. 

I'm making the (perhaps foolish) assumption that bluetooth doesn't degrade the digital signal, and the amp itself does the DAC conversion. Please educate me as I'm still n00bish. 

My friend convinced me of the benefits of having a headphone amp, and I would to get a beginner allrounder to possibly pair with UE 900's.   I'd like bluetooth, because I have little luck with things being physically attached to my phone and adding bulk. I'm also imagining that I could use...

I base this on the fact that at Logitech the 900's are €199, instead of €399, and the fact that Amazon.com says there are only 3 left in stock.   In the past there was a multi year gap between models. I think the Triple-Fi 10 came out, in like 2006.   Please tell me what you think to calm my...