I was wondering if Apple improves the sound quality with each iteration of its devices. In other words, is the 4 or 4S any better than the 3? We'll have to wait and see, but I wonder if the 5 will be any better than the 4s. Additionally, I have a bunch of older iPhones in the house which I could repurpose as just music players, but if the sound is worse on older devices maybe it's not worth it. I realize the quality of sound depends on the source and the rip -- I'm doing mostly Apple lossless or FLAC (via FLAC Player on all but the iPod Classic and Nanos) -- but I'm curious to see how the sound quality of the device itself fits into the equation. Thanks for any input . . .