I've asked on this forum before however i had ago at putting together a build and would really love some insight into whether i'm going the right way 
So far i have :
Asus P8Z68-V PRO, Intel Z68, S 1155, PCI-E 2.0 (x16), DDR3 2200(OC), SATA 6Gb/s, RAID, ATX, HDMI - £149.62
Intel CPU Core i5 Unlocked 2500K Sandy Bridge Quad Core Processor - £163.40
Gainward GeForce GTX 570 Phantom 1280MB NVIDIA Graphics Card - £287.48 x2 = £574.96
LiteOn IHAS124-19 24x DVD±R, 8x DVD±DL, DVD+RW x8/-RW x6, DVD-RAM x12, SATA, Black, OEM - £15.11
Corsair Enthusiast TX V2 CMPSU-850TXV2UK 850W Power Supply (PSU) - £96.94
Creative SB X-Fi Titanium PCI-E 7.1 Soundcard - £64.43
1TB Samsung HD103SJ Spinpoint F3, SATA 3Gb/s, 7200rpm, 32MB Cache, 8.9ms, NCQ - £39.25 x 2 = 78.5
Corsair Vengeance 6GB (3x2GB) DDR3 PC3-12800C8 1600MHz Triple Channel Kit (CMZ6GX3M3A1600C8) [CMZ6GX3M3A1600C8] - £68.56
Thermalright Silver Arrow CPU Cooler - £47.99
Cooler Master CM-690 II Advanced Dominator Case - Black [RC-692-KKN2] - £71.87
Good or bad?

So far i have :
Asus P8Z68-V PRO, Intel Z68, S 1155, PCI-E 2.0 (x16), DDR3 2200(OC), SATA 6Gb/s, RAID, ATX, HDMI - £149.62
Intel CPU Core i5 Unlocked 2500K Sandy Bridge Quad Core Processor - £163.40
Gainward GeForce GTX 570 Phantom 1280MB NVIDIA Graphics Card - £287.48 x2 = £574.96
LiteOn IHAS124-19 24x DVD±R, 8x DVD±DL, DVD+RW x8/-RW x6, DVD-RAM x12, SATA, Black, OEM - £15.11
Corsair Enthusiast TX V2 CMPSU-850TXV2UK 850W Power Supply (PSU) - £96.94
Creative SB X-Fi Titanium PCI-E 7.1 Soundcard - £64.43
1TB Samsung HD103SJ Spinpoint F3, SATA 3Gb/s, 7200rpm, 32MB Cache, 8.9ms, NCQ - £39.25 x 2 = 78.5
Corsair Vengeance 6GB (3x2GB) DDR3 PC3-12800C8 1600MHz Triple Channel Kit (CMZ6GX3M3A1600C8) [CMZ6GX3M3A1600C8] - £68.56
Thermalright Silver Arrow CPU Cooler - £47.99
Cooler Master CM-690 II Advanced Dominator Case - Black [RC-692-KKN2] - £71.87
Good or bad?