Interesting seeing all the comments. From my perspective, the Jabras are way good enough, particularly at the cost. The SQ is really good (bass is surprisingly good - listening to Kravitz's 'Sister' that first bass note still kicks well enough, even with flat EQ), and the fit, features and general functionality is excellent. TBH, I thought about waiting for the Senns before ordering them, but a friend who I trust said the Jabras were excellent, so I thought I'd save £100.
The Gizmodo and Forbes review (despite taking them with a large pinch of salt), and my previous love of the IE80 sound just tipped me to pre-order the Sennheisers, because my focus is 75% sound, and 25% features. If the Senn call functionality and app are mediocre, but the SQ is really as good as the initial reviews imply, then they'll do me fine. That said, unless I'm blown away comparatively by the Senns, they'll go back and I'll stick with the 65Ts. Thankfully for me, being in the UK and having not got a return history with Amazon, I can very carefully try the Senns for 20 mins which will be enough to know which will be returned. That's what I love about Amazon Prime - they'll take the return, no questions asked. I suspect they make more money that way anyway, since a lot of people probably pull the trigger on stuff they wouldn't normally buy, and the small percentage of returns are sold easily through their used/refurb channel.
For the guy who worried about the Senns sticking out of his ears too much - I worried about that too, but then realised that my old IE80s looked huge (and before that I had the UE SuperFi V EBs which were enormous) so as long as they fit well and sound good, I couldn't give a toss what I look like.
jk
