Need help with choosing mp3 player

Tweet

Hi guys, my old mp3 player (Creative Muvo =w=) is hardly working right now so I thought I should buy something new. My ideal player would be small so I could run with it and minimum 4gb for music. Can you recommend me anything? I don't need big screen, I don't intend to use it for anything more than listening to the music. I've heard sansa and sony has the best sound quality, do you have any experience with them?