Betwen the UE900s and the IE80, the IE80 are a clear winner for music on the go. I also have the SE215, Momentum In Ears, Klipsch S4, Kinera H3 and several others arround the $100 mark and the IE80s makes me regret buying those. That being said, the IE80 are good but they are not "sweep your feet off the ground" good; At this point I'll say "worth" is subjective to the individual, and for me, the IE80 should be priced at arround 150-180 to be considered a good value. If I could go back in time, I would tell my past self to keep the $16 earbuds that sound amazing for the price, save all the money I spent on (better) IEMs and buy the SE846s directly without the "waste" in between. Then again, I don't own the SE846s and I may be wrong, I plan to buy the SE846s next (any feedback on the SE846s is welcome).