I stopped over my local Bose store the other day to get a fresh listen to their line of headphones. I've tried the SoundLink on-ear BT a few times and just can't get comfortable with them. Sound is good but ear fatigue sets in too soon for me. My goal is and will continue to be finding a good everyday BT headphone, in-ear or over-ear.
That said I thought the QC25s really sounded blah and weak in overall sound quality. I always plug my iPhone in when doing testing there so I can compare what I know sound right. Bass and sub-bass really lacks energy on the QC25s. NC is very, very good but my normal listening environ is not a noisy place so NC is not overly important.
Next I tried the QC20i and I thought they had the absolute best sound of all their headphones. So I picked up a pair at their sale price of $250. Had them now for 2 days and they are very comfortable and have a balanced, yet bass enhanced sound. Since I use headphones every day (my go-to is Apple earbuds Gen.2) I find the battery/electronics dongle a real pain in the butt. Getting it in and out of my pocket is a real drag. Having to be sure I orient it so the headphone jack sits on the bottom of my pocket is very awkward.
I'm also not a real fan of the wire. I know it take a while for the cord to relax but I find the rubbery feel a bit much when hanging down from my ears. I'll give it a few more days before deciding to return them or not. NOW if these were wireless, my search would be totally over. Sound wise they hit my sweet spot.