I'm doing the same at the moment and ended up with this:
Components
Intel® Core™ 2 Duo Processor T8100 (2.10 GHz, 800 MHz FSB, 3 MB L2 cache)
Genuine Windows Vista® Home Premium SP1- English
1Yr XPS Premium Warranty Support - Priority Call In and Onsite Support
2.0 mega pixel Camera & Tuxedo Black for CCFL Display
15.4" Widescreen™ WXGA (1280x800) TFT Display (220nits) with TrueLife™
3072MB 667MHz Dual Channel DDR2 SDRAM [1x2048+1x1024]
250GB (5400RPM) SATA Hard Drive
NVIDIA® GeForce™ Go 8600M GT with 256MB dedicated graphic memory
Fixed 8x DVD+/-RW Slim Slot Load drive, including SW
Primary 6-cell Lithium-Ion Battery (56 WHr)
All for 760 GBP. Including VAT and shipping. Only problem is, that extra 100 pounds from the VAT exceeds it over my budget. I can get a VAT refund if I buy it from a shop so I asked my brother to look in the local shops for something similiar.