I'm a serial headphone purchaser: I've got Sennheisers, VModa, jays, Sony, Apple and now My second pair of Klipsch. The audio quality is as good as I've heard from my keenest £100 pair of vmodas and outstrips Apple by a clear mile. The bass response is great and more than anything, they are the most comfortable 'phones I've ever used. The oval tips are a winner for me. If it weren't for the lack of clicker on my Klipsch Image S2s, I would have stuck with those. My only criticism of the S4i is the bud design. It looks a little like something out of 'I, Robot' and I prefer the look of the S2s. That said, these are my favourite earphones right now and I've stopped impulsively buying more!