Essentials are component-out (I believe most gfx cards are bundled with DVI to component converters?) and ability to play HD content. The inclusion of BD/HD DVD Rom drive to be added at a later date.
Microsoft Windows Vista Ultimate 32-Bit Edition DVD - OEM - 1Pk (66R-00765) £97.99 (£115.14)
Sapphire ATI Radeon HD 2400 XT SILENT 256MB GDDR3 HDTV/DVI (PCI-Express) - Retail (11116-00-20R) £41.99 (£49.34)
GeIL 2GB (2x1GB) PC6400C4 800MHz Ultra Low Latency DDR2 Dual Channel Kit (GX22GB6400UDC) £54.99 (£64.61)
Intel Core 2 Duo E4400 "LGA775 Allendale" 2.00GHz (800FSB) - Retail £69.99
(£82.24)
Asus P5B (Socket 775) PCI-Express DDR2 Motherboard £69.99 (£82.24)
Seagate Barracuda 7200.10 320GB ST3320620AS SATA-II 16MB Cache - OEM £45.99 (£54.04)
Antec Fusion Black HTPC Case - 430HE Watt PSU £96.99 (£113.96)
Sub Total : £523.92
Microsoft Windows Vista Ultimate 32-Bit Edition DVD - OEM - 1Pk (66R-00765) £97.99 (£115.14)
Sapphire ATI Radeon HD 2400 XT SILENT 256MB GDDR3 HDTV/DVI (PCI-Express) - Retail (11116-00-20R) £41.99 (£49.34)
GeIL 2GB (2x1GB) PC6400C4 800MHz Ultra Low Latency DDR2 Dual Channel Kit (GX22GB6400UDC) £54.99 (£64.61)
Intel Core 2 Duo E4400 "LGA775 Allendale" 2.00GHz (800FSB) - Retail £69.99
(£82.24)
Asus P5B (Socket 775) PCI-Express DDR2 Motherboard £69.99 (£82.24)
Seagate Barracuda 7200.10 320GB ST3320620AS SATA-II 16MB Cache - OEM £45.99 (£54.04)
Antec Fusion Black HTPC Case - 430HE Watt PSU £96.99 (£113.96)
Sub Total : £523.92