Sony Ericsson S710a

Which would you say is better? They both have the same features... Bluetooth, EDGE, swivel design, etc etc. Except the W600a has more storage: 256MB vs. the 160MB on the S710a (internal and memory card combined), and the keypad seems likes it would be easier to text on. The W600a is a tad bit smaller, making the screen a bit smaller too, but listening to music drain the battery even with a smaller display. The design of the W600a might be for the young and "hip" generation, and the S710a seems like it would be for the more "business orientated." Please help me make a decision. I've just discovered the W600a today, and I can't make up my mind. Get the S710a for $200, or wait until the W600a comes out?