I just sold a pair of Bose QC2's on eBay. They are great for flying or for any situation where you want noise reduction. I never used them enough to justify having expensive headphones.
I also would say although sound quality is good, noise reduction is their main strength.
Have you considered the new Bose OE "On Ear" model? I tried on a set in BestBuy when I got my new IE's and they sound excellent and seem quite comfortable. Also, they come with a nice case and are quite a bit less expensive then the noise reduction models.
As far as a review of the Bose IE's "In-ears" I really like them. They are WAY more comfortable then the Apple earbuds and have much better bass response. They are kind of a hybrid design of sorts. They have silcon tips that can be changed out like the "in-canal" designs, but they actually sit in the bowl of the ear like the Apple ear buds do. The difference is the Bose lets you change the size to fit your ear and instead of hard plastic they are made of soft silicon. I must have big ears because I have to use the large tips, but they stay put. I can shake my head all over and they do not fall out like the Apple ones did. Also, they don't cause "pressure points" like the standard earbuds do.
They sound good. Not as good as an over the ear or even on ear headphone would, but very good for an earbud. The bass is excellent. Almost too much bass at times. You have to adjust your equalizer a little bit to get the sound you want, but once you get them tuned to your taste they sound nice. If you want an good quality ear-bud for $99 they are probably one of your better choices. They also come with a real nifty case to store them in. There are probably better choices, however I have also noticed prices can get a little crazy for earbuds when you start getting into the high end stuff.
It depends on how you want to use them. If you are sitting around a lot you might be better off with a real set of headphones. If you want to be more active with your music listening then the IE's are a good choice.
