mp3 player suggestions please? Here's my criteria.....

I tried Cnet's tool to narrow things down, but it's giving me alot more audio accessories and add-ons than players.

Can someone suggest a player based on these criteria? The most important features and functions are listed in order of importance:

Great one-handed interface
I will be using this on the road. Subway, jogging, etc., so it's important I'd be able to navigate one handed w/o having to rely on looking at the screen often. Being able to easily scan between tracks is desired as well (e.g. fast forwarding 20s quickly). Also to have playlists and being able to sort on the fly

-5GB to 20GB capacity
-preferably <$75, but <$150 also ok
-rechargeable battery, but good non-rechargeable battery life () also ok
-can handle nonDRM files.

If there are other features that u feel are important, please bring those up as well. Thanks in advance.