From what others have said, the price difference in the UK was far greater than here in the US. (The difference between the 8 GB SSD Linux and 120 GB WinXP was around $30-$40 USD here.)
If that's going to be the case, you should probably wait. However, I just bought the XP version, (of the 160 GB, 6 cell battery) wiped XP off it and put Fedora on it. If you're relatively familiar with Linux, it's not overly difficult. (Although, for what it's worth, I did have trouble trying to get a DVD on a USB drive--in the end, I just put on the F10 livecd and installed using that. I suspect this is because I wasn't expecting issues, having used CDs with USB drives for awhile, and should have googled a bit more, but it wasn't really worth the trouble for me.)