The good 'ole iPod. Never found a better mp3 player. Still have mine (iPod Video model), though it's been a little more than a decade since I converted it to a "FlashPod"; replaced the mainboard with an aftermarket rig that takes memory cards instead of the original 1.8" hard drive. First version took an SD card, but the current iteration can take up to 4 microSDs with a max of around 4TB.