I used to own an Archos Jukebox which had 20 gig capacity, but I quickly found out that that much room is just rediculous and you'll never use it. So I got rid of that thing and got a Rio Carbon last month. 5 gig drive, it shows up as an external hard drive when connected by the supplied USB 2.0 cable, so all you do is drag and drop music onto it and its done.
It also automatically sorts the files based upon the track tags so you can easily play just a certain artist, everything in shuffle mode, anything you've added in the past day, week, 2 weeks, or month, etc. It also charges through the USB fairly quickly which is nice, less cords on my desk. It also has a longer battery life, recording mic for voice memos recording lectures etc., and one gig more capacity than the IPod Mini, which is its similarly priced counterpart. Smaller, lighter, and alot sleeker too.
If you can't tell, I love this lil thing.