Do you need monitor, keyboard, mouse or any other peripherals? If not this may be suitable, it is currently under budget so could be altered in a few areas but I probably wouldn't advise you to get quad-core just yet as it isn't utilised fully by much at all. Oh and I know nothing about TV Tuner cards so it is just one with dual tuners.
Gigabyte GA_965P_DS3P (Socket 775) PCI-Express DDR2 Motherboard £74.99
(£88.11) £74.99
(£88.11)
Samsung SH-W183 18x18 DVD±RW Serial ATA Dual Layer ReWriter (Black) - OEM £17.99
(£21.14) £17.99
(£21.14)
Intel Core 2 DUO E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - Retail £151.99
(£178.59) £151.99
(£178.59)
Creative X-Fi Xtreme Gamer 7.1 Soundcard - OEM £39.99
(£46.99) £39.99
(£46.99)
Microsoft Windows Vista Ultimate 64-Bit Edition DVD - OEM - 1Pk (66R-00838) £109.99
(£129.24) £109.99
(£129.24)
Corsair HX 620W ATX2.2 Modular SLI Compliant PSU (CMPSU-620HXUK) £84.99
(£99.86) £84.99
(£99.86)
Antec P180 Advanced Super Midi Tower Case - No PSU (Silver) £68.99
(£81.06) £68.99
(£81.06)
Seagate Barracuda 7200.10 320GB ST3320620AS SATA-II 16MB Cache - OEM £51.99
(£61.09) £51.99
(£61.09)
Asus GeForce 8800 GTX HTDP 768MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail £324.99
(£381.86) £324.99
(£381.86)
Team Xtreem 2GB (2 x 1GB) DDR2 PC2-6400C4 800MHz Dual Channel Kit (TXDD2048M800HC4DC) £149.99
(£176.24) £149.99
(£176.24)
Terratec Cinergy 2400i DT DVB-T TV Tuner (PCI-Express) - Retail £69.99
(£82.24) £69.99
(£82.24)
Noctua NH-U12F (Socket LGA775/754/939/940/AM2) Heatsink £30.99
(£36.41) £30.99
(£36.41)
Sub Total : £1,176.88
Shipping cost assumes delivery to UK Mainland with:
City Link Parcel Next Day (Delivered Mon-Fri)
(This can be changed during checkout) Shipping : £24.95
Vat : £210.32
Total : £1,412.15