£450(max) laptop advice please?

[c0sie]

After nearly 3 years of solid University abuse my laptop is frail and close to death.

During May I need to buy myself a new laptop to replace my beloved Fujitsi-Siemens LI thingy and need some advice as to whats best for my budget.

• I need to have at least 3GB+ of RAM.
• A massive HDD isnt that important to me really as I use external HDD's to store my important stuff.
• Needs to come from a reputable shop that I can either collect from (PC World, Comet etc) or one that will deliver to me.
• Needs to have working versions of Microsoft Office (no trials)
• Needs to come with Windows 7
• Need at least 4 USB ports
• Need a DVD-RW
• 15.6" screen or bigger
• Memory card reader would be nice
• Wireless

Cant think of anything else at the moment, and any advice is greatly recieved