J.G.
I don't know from experience but was looking at this option too for our phones. Every review I read about the phone/mp3 player said the same thing...get one or the other. It seems that you're either going to compromise sound quality on the mp3 player or phone quality/abilities but not able to get great quality on either. I have the razr and love it. My husband just got the SYNC and is happy with it, but the mp3 is just a "bonus" for him, he's never used it and doesn't even know how it works. Plus, the issues we've have with battery life on our phones, I can't imagine adding an mp3 player, it would just go through charges too fast. I have a ipod shuffle and can't imagine looking at anything that's not compatible, which limits me to the iphone. It's in my future, just not right now!