The link is not working so use the link that I posted below in post 7 or this:http://configure.euro.dell.com/dellstore/config.aspx?b=&c=uk&cs=ukbsdt1&kc=D4X43002&l=en&m_30=143659&oc=D014302&rbc=D014302&s=bsd
You need to upgrade so that the basket price is at least £439 ex VAT so you can use the 10% off voucher BK2CWCGV$9XRS4. The £40 off means the pre-discount price will meet the minimum requirement of £479.
One suggestion is upgrading the RAM to 4GB DDR3-1333 and then adding something else like the Firewire card.
Topcashback are offering 6% PLUS £18 on Vostros which potentially brings the price down to £427 delivered which is very good for this spec.
Vostro Desktop 430
Intel® Core i5 -750 (2.66GHz, 8MB)
Windows 7 Home Premium (choice of 32 or 64 BIT)
Memory 4096MB (2x2048) 1333MHz
Video Card 1GB NVIDIA GeForce GT220 (DVI, VGA, HDMI)
Hard Drive 320GB (7200rpm)
DVD+/- RW Optical Drive
Dell Standard Quietkey USB Keyboard & Dell 2 Button USB Optical Mouse
Video Editing IEEE 1394 PCI Adapter card
Standard Warranty 1 Year Collect and Return
Microsoft Works 9.0, Norton Internet Security 2010 - 15 Month Protection