A: Probably it is necessary to buy the easiest - XS 100. It can be carried in a pocket.
B: Yes, but at it the smallest screen, and JAMS 300 can contain more songs.
A: But JAMS of 300 songs contains less, than MUSIC 200.Music 200 is slightly heavier than XS 100, but it is easier, than JAMS 300.
В: But it the most expensive. And I like to change songs often.
A: Then JAMS the best choice.
B: Yes, you are right. And money at us on it will suffice.