iPod. I'm not saying it because they're popular or whatever. A couple years back I decided I wanted something to be able to watch .hack on....so I decided I was going to save up and buy an 80gig. Well, months later with half of the money saved, on December 28th, I was surprised with a 30gig iPod. To this day I have not once had to replace it, or the case it's been in.
It's been almost 3.5 years now, and my iPod has maybe 3 scratches in it total. It goes everywhere with me, and has been dropped and thrown and whatever else many many times and it's still in great condition.
I don't much like iTunes, but I'm not about to complain because it was a gift. I believe I have maybe 10gig total or even less than that on my iPod so far. (I never did get .hack onto it...my dvd converter does nothing but crash when you try to convert)
Anyways, my iPod has sustained many many things and survived. I have friends who go through a new mp3 player every 2 months or so because they die or they break or something. As long as iTunes continues to work with my now-getting-old precious, I will continue to use it.