I just thought I would start a off topic thread as I'm looking for a new player but I cant find anything that looks as good as my Rio Karma.
What I basically need is something that has all the features of my Karma but with a higher storage capacity.
I don't know the Karma, but a 5.5gen iPod provides up to 80 GB of storage. There are probably some of them sold on eBay now due to updated models and the iPhone.
In addition to that, I just stumpled across http://www.anythingbutipod.com/compare/ which compares different portable players. Maybe you'll find something there.