I have had nothing but trouble with iRiver. I have had to have it replaced twice and lost all my music both times. I also had to mail the broken one back to them at my own expense. I would not recommend it. I am in the same boat replacing the iRiver, also going travelling. I have narrowed it down to Creative Zen Vision or Toshiba Gigabeat.
I've owned 3 or 4 ipods within the past 4 years all of which have dissapointed me by breaking down soon after the warranty expires. I'm currently travelling and in desperate need for a music device that WORKS. I've heard that sony is a good company to buy from and irivers are also good quality. i want something that can hold a few thousand songs and something that will last a while. Any suggestions??