@bubsdaddy, this picture is for you. The QC25 makes you a good head, no more of the atrocious gape you mentioned.
Ok, just to be clear, no the plush-monkey doesn't hold a miniature sun in my apartment. And yes, my plant would benefit from the aforementioned miniature sun.
Noise cancellation is really really good. I'm putting them to the test right now with a portable A/C on, and QC25 are impressive. I remember the QC15 being really good too, in the store, but I can't actually compare the 2, since I don't have the 2 at hand. But Bose says they improve the NC and the SQ. I'll take that as true.
They look awesome. Really. I don't know if they're that good, or just really better than QC15, but for me, QC25 is a success. The matte finish is so attractive (that's objective though, but I do enjoy that kind of color, at least for headphones). I just don't know if I like the denim-like material they choose for covering the top of the headband. At least, it is dark, so it doesn't catch attention too much. I wouldn't be shy wearing them outdoors, but I would've with QC15.
Build quality doesn't seem to be a problem. No rattling, cracking or anything, yet they are very light for what they are (NC + battery). Comfort is supreme : it's like an angel's a** sitting around each of your ears. I wore them for, like, 5 hours straight, and not the smaller hint of pain or sore. I feel I could keep them on all night long without any problem. They also have a considerable amount of head padding, that helps your scalp being relaxed.
Sound quality, well, they have not played a lot since I got them. I must wait a little. But I can say that they need power. Straight in the computer, it needs to be 75% of max volume for coming to life. I doubt, but maybe this will be corrected after burn-in, if they even need it. I'll wait anyway.
All in all, you must see and try them for yourself. US$300 (CAN$330) is a smart price IMO. They seems to be better than QC15 in all department, with the same retail price. Same, too, as the Beats Studio. But Studio's NC can't compare to Bose's. Nothing can, honestly.
BTW, the colored ones in the first post will sell for US$400 in November. That's ridiculous I think, since the matte black are cool enough for 100$ cheaper.