I think it's important in a situation like this to distinguish between something that scientifically and objectively has a superior sound signature and something that is a personal preference.
The iBuds are a "fun" headphone. They are easy to pop in your ears and have a tune belted out. From the listening I've done, they offer a very accessible style of music. If I only wanted to listen to music for 5 minutes, I might even say they work as a positive.
It's kind of like TV. No one in their right mind would say that the "reality shows" propagating throughout the American system are of a higher quality than, say, CSI or The Practice. However, I know a lot of people that don't want a well-designed plot and so forth if they're channel flipping.
I guess I'm guilty of the same. If I've only got the TV for a few minutes, I'll flip on ESPN almost without thinking about it. I wouldn't call the 3rd rerun of highlights from the NFL last night the most enriching entertainment, but it's easy to watch. I find if I put my Denons on, I hardly ever want to take them off! Not the best necessarily for when I only have a few minutes to chill to a song or two.
The same applies here. It would be foolish to say the iBuds are a high quality pair of headphones. I
don't, however, think it's idiotic to like them, as long as you've tried the other headphones out there. Saying they rock (and I had someone like this on another forum) without trying the alternatives is just speaking in feeble ignorance. When I told him that they are widely regarded by the audio industry as crap (though I did not say that specifically about him), he got offended and went off on a tangent about how he must be deaf and therefore he only "feels the vibrations."
His lack of maturity in the responses further illustrated how clueless he was about headphones, and the OP (who was asking about what a good set of headphones to buy is) flatly ignored anything he said and thanked me for a comprehensive response.
I'm not sure what set of headphones he went with, but I tried to put my admittedly limited experience gained from this site to use. Because in the end personal experience is irreplaceable.
That said, man... you like the iBuds? haha.