There is no good answer to this one. It's why you use a FM radio and some FM transmitter from your HD MP3 player or just go back to solid state. The new smaller HD players are nice, but the makers will not stand up and tell you what you want to hear and back it up with the warranty.
At the some hundred dollars, its a shame you can't rent one for a day.
I am interested in buying a hard drive player. I plan to use it on long trips as well as running at the gym. So, needless to say I need one that can hold up strong. I noticed that somebody else posted something like this but there was never a good answer. So I need to know whether the 20-40 gb players really have a problem with someone jogging/running with them? Or do certain types hold up better than the others. Thanks!!!