My first impression was that the bass seemed completely missing. I put in a pair of apple headphones (known for poor quality sound) to compare, and although the Klipsch sounded much nicer, the bass levels were comparable. Turning up the bass on whatever device I had them plugged into did not help, in fact it made it seem worse. I put the one ear bud I had remaining on the Bose headphones on, and the bass levels were a world of difference. Base levels matter to me a lot, and not just for music. If I'm listening to talking (whether it's a let's play on YouTube, or a podcast) I still find the bass important. I was very unsatisfied with the bass level in the Klipsch pair.
Another thing I noticed was the normalization felt very uncomfortable. Loud is loud and quiet is quiet. What I mean by that is if I'm watching a video of someone playing the very scary game, Amnesia: Dark Descent, when they scream it hurts my ears. If they're speaking softly I have to turn up the volume, when they speak loudly I need to turn down the volume. This holds true for music as well, but not nearly as much. Some songs have a loud or intense part where I feel the need to turn the volume down. Using the Bose pair I never felt the need to turn up/down the volume based off of how quiet/loud the content was.
One minor gripe I had was that while plugged into my speakers at work (where I do most of my listening), there was a constant, soft humming noise in the headphones even if no sound was being played. I fully realize that my work speakers are crap, however the Bose didn't do that nor did the Apple.
The Klipsch pair are priced at $100, but I found them on Amazon for $57. Are these headphones worth $57? Maybe... depends on the user. Are they worth $40? Definitely. $100? Definitely not.
The best thing about the Klipsch are that they are extremely comfortable. I barely notice that they are in my ears until I take them out. Like the Bose pair, they come with a set of different sizes so you can better fit them to your ears, something very important with headphones. A good fit means noise cancellation, which the Klipsch are also good at. I would say they are just as comfortable as the Bose, if not more comfortable. However they don't stay in my ear's as well and I've tried all the different tip sizes.
I contacted Bose, and luckily they have a solution for me. My broken Bose pair are out of warranty, so they won't be fully replaced, however Bose will let me exchange the broken pair plus $60 the newer model (which is half the original price). I will promptly be returning the Klipsch set and getting a new pair of Bose. Do I recommend others buy a pair of Klipsch? Yes, but only if you pay much less than the original price. Klipsch offers some headphones in the $200 - 300 price range, which I'm sure are as good, if not better, than the Bose pair. However I am not a professional headphone reviewer, so it looks like I'll never know.