I’ve just had a look at the Macbook lineup.. It’s about 3 years since I had a new laptop and my current 1g macbook is starting to show its age.
This Macbook comparison highlights the differences between the Aluminium and the White model. Why is the Aluminium one £210 more?!

I’ve only listed differences here:

White – £719Aluminium – £929
2GB RAM – DDR2 (@667MHz)2GB RAM – DDR3 (@1066MHz)
120GB HDD160GB HDD
Scrolling trackpadMultitouch Trackpad
Glossy screenGlossy screen +backlight & light sensor
Firewire 400N/A
4.5 hours on battery5 hours on battery

Is that really worth the extra? I’m pondering a non-Mac, just in case you wondered.