I bought the QC20i earlier this year and have been using them quite regularly since- really have no complaints and can say this was a good purchase and will recommend if you want a good quality in-earphone set for noise canceling purposes.
I have always been quite doubtful about BOSE products- it was actually a review here
http://lufthansaflyer.boardingarea.c...ison-surprise/ that pushed me over the edge to buy them.
Money well spent.
FWIW the best price I could find here in Europe was about 229 EURO with Amazon which is what I went with.