So the U Fly just plugs like it did on the QC2? It looks like that same plug in the pictures.Traded in my QC2 for the 15. So far they work great. The 15's noise reduction is significantly better than the 2's. Also it seems to me the inside of the ear cup is bigger allowing a better fit.
Best option for outright purchase of QC-15 is www.crutchfield.com, since they don't charge tax or shipping. Bose will charge you tax. Also, ask for a new customer discount code of your own.I think Bose.com is probably the best option. Don't think anybody is discounting yet