I've narrowed it down to the following 3 options so would appreciate some input on which option would be best:
1) Dell Vostro 200 ST (slimline)
Intel Core2 Duo Processor E7200 (2.53GHz, 1066MHz, 3MB cache)
2048MB 800MHz Dual Channel DDR2 SDRAM [2x1024]
250GB (7200rpm) Serial ATA Hard Drive with 8MB DataBurst cache
MSI 8600GT 256MB GDDR2 DVI HDMI TV Out PCI-E Graphics Card
Genuine Windows Vista® Home Premium SP1
£280
2) Shuttle SD30G2
Intel Core 2 Duo E7200
Crucial 2GB RAM
Seagate ST3500320AS 500GB Hard Drive SATA II 7200rpm 32MB Cache
MSI 8600GT 256MB GDDR2 DVI HDMI TV Out PCI-E Graphics Card
£360
3) As option 2 but with a different case, eg:
Asus T3-P5945GCX
MSI Hetis 945GC
MSI Hetis G31
Aplus Blockbuster Storm
I'm not too sure about the chipsets used on the shuttle/other cases. Never bought a dell before so i'm not sure what their performance is like but the price is definetly right