I have posted this as its a new Dell Line, Vostro 400. Its not cheap and in my opinion your better off with the Vostro 200 range. This does come with better graphics as standard though.
Remove the Dell 19" Value Wide Flat Panel (E198WFP)to reach the above price.
Remember to reduce the warranty to minimum where applicable and buy via *Quidco for further cashback savings.
305-D09V41A Home site - Best price £411.32 Delivered or *less.
Vostro 400 DT (D09V41A)
Vostro 400 E6550 Core 2 Duo Processor (2.33GHz, 1333Mhz FSB, 4MB cache)
Genuine Windows Vista® Business - English
2048MB 667MHz Dual Channel DDR2 SDRAM [2x1024]
320GB Dual Hard Drive Non RAID (2x160GB - 7200rpm)
Video Card 256MB nVidia GeForce 8600GT Graphics Card
Dell Entry Quietkey USB Keyboard - UK/Irish (QWERTY)
Dell 2 Button USB Scroll Optical Mouse - Black
Integrated 7.1 Channel High Definition Audio
Microsoft Works 8.0 - English
16x DVD +/- RW Drive
13-in-1 Media Card Reader