How about this @ £499:
http://aldi.medion.com/md98410/uk/?refPage=aldi
Intel® Core™ i3-350M processor
Intel® HD Graphics with digital HDMI connector
17.3'' widescreen LED-backlit display with HD resolution 1600 x 900 pixels
3GB DDR3 SDRAM memory
500GB S-ATA hard disk drive
For more than 100,000 music tracks/photos (at 4 MB per track/photo)
Using the integrated second HDD-slot you can more than double your storage capacity with a standard 2.5''/6.35cm hard disk
High Definition Audio with 2 speakers and 1 subwoofer, Dolby Home Theater® v3 certified
Digital DisplayPort and HDMI output for brilliant multimedia experiences
Wireless LAN IEEE 802.11 n-standard technology with up to 300 Mbit/s 802.11b/g compatible2
eSATA connection - for fast and lossless data transfer with external storage devices
8x multi-standard DVD/CD burner with DVD-RAM and Dual Layer support3
Keyboard with flat key design and integrated number block
Powerful 8 cell high performance Li-ion battery
Network Controller Gigabit LAN (10/100/1000 Mbit/s)
Multi-format memory card reader (SD, SDHC, MMC, MS and MS Pro) (Memory cards not supplied)
Comprehensive software package (OEM versions) with genuine Windows® 7 Home Premium 32 Bit
We have 2 Aldi/Medion PCs (one about 4 years old and the other about a year) and are delighted with them.
A 3 year warranty is standard and apparently their quality and customer service has improved a lot over recent years although I've not had to use it. I'd have no hesitation buying another Medion.