I have the iPod 5.5gen now that has a better Wolfson DAC than the Nexus S (galaxy s1) + Voodoo. In fact, as much as I'm SUPER impressed with the Fiio E17 amp/dac, I could ALMOST do without it (especially if i didn't care about the USB dac) and the iPod. The Nexus S (with voodoo) was JUST THAT good to my ears. I miss the awesome touch interface, Poweramp player with all its amazing features including crossfading, and being able to download songs right onto the phone over wifi.
The E17 does drive my headphones better though, and is cleaaan even with the 12db gain and I'm sure that also has to do with the iPod as well. I never tried the Nexus S + E17. 5db gain on the nexus S was amazing though.....again VOODOO is responsible for that <3
***********I've tried a few different Galaxy S1 phones.... Fascinate, Vibrant, Epic (sprint slider phone) and Nexus S....... Nexus S has the best amp. Quite a bit louder than the others (Epic is pretty loud also).
THE only reason why I sold it was to try the Ipod and because it didn't have expandable memory (16gb). Now that I have the E17, I could easily see myself buying a Vibrant which has 8gb or 16gb built in + my 32gb microSD.
It sounds like I'm discounting how much I like the E17, but I really am not--it has truly exceeded my expectations and I'm 100% satisfied. It's more the old iPod interface that I don't like using so much.