Okay, I was only asking to see what bands your phone needed.
I would say rule out the Nokia 6103-sure Nokia have great reception, but I've heard negative things about the build quality and it's the lower end between the 2.
The x680 has 35mb for MP3s (not a lot), while the SE K600 has an FM radio, and the higher resolution camera.
I would say go with the SE, personally, unless she would rather put 10 MP3s instead of the radio, or likes the form factor better,