Not a new build but looking for some upgrades 
Current spec
Well say budget around 500-800

Current spec
Intel® Core™ 2 Quad Q6600 Quad Core Processor(2.4GHz,8MB Cache,1066MHz)
Genuine Windows Vista™ Home Premium Edition
Digital / Analogue TV Tuner PCI Card
Aluminium ATX Midi Tower + 550W PSU
PCI-Express Mainboard - SLI nForce 650i SLI(C55) - Intel Core 2 Duo/Quad-Core - ATX
OCZ 2GB DDR2 900MHz Memory -( 2x 1GB Kit)
500GB Serial ATA Hard Drive with 16MB Buffer
LightScribe Super Format 20x Dual Layer DVD Writer +R/-R/RW/RAM
512MB nVIDIA GeForce 8800GT - Dual DVI, HDTV, TV Out
22" Iiyama ProLite E2202WS, 5ms Widescreen Digital & Multi Media TFT Display
Creative Labs Sound Blaster X-Fi Xtreme Gamer Sound Card (oem)
Logitech S500 - 5.1 Speakers with Subwoofer
6x USB 2.0 Ports (10x possible on motherboard)
2x IEEE1394 Firewire (onboard)
1x Gigabit LAN (onboard)
Multi-format Memory Card Reader
Well say budget around 500-800
