Personally, I didn't think Bluetooth was worth £600, so I picked up the US model when I was in San Francisco earlier this year.
How does that effect you if it breaks ? Do Sony have a worldwide warranty ?
I didn't like Sony laptops (except the picture book) until I played with the SRX51, which I fell in love with after having it for a few days. Then I had to give it back to it's owner :-(
I was "playing with it" because I friend bought it to take around the world with her on the 11 month
http://www.clipper-ventures.com/ round-the-world yacht race.