What about something like this, quick search shows...
Acer Aspire 5672WLMi
Core Duo T2300 1.66GHz
1024MB
80GB
15.4 Inch WXGA TFT
Modem
LAN
WLAN
DVD SuperMulti DL
5in1 Card Reader
XP Home
ATI Mobility Radeon X1400
£600
Im not saying buy that, im just trying to give an exmple of whats out there in your price bracket.