I totally forgot to mention what my main uses are:
I mainly use my pc for internet, office work (eg word,excel,powerpoint), music, and watching videos.
On another note the Dell 1545 caught my eye at £399.
Intel Core 2 Duo T5800 (2GHz, 800MHz FSB, 2MB Cache)
Genuine Windows Vista Home Premium
250GB Hard Drive
15.6" Widescreen Screen
Please let me know your thoughts, cheers guys!