could get below the £1k by going for the 64gb ssd if needs be, or drop the psu to a 650w version if you dont think your going to sli the 580gtx, or drop the 580 to a 6970.
Gainward GeForce GTX 580 "GOOD Edition" 1536MB GDDR5 PCI-Express Graphics Card **Supplied with FREE Batman: Arkham City PC game** £371.99 (£309.99)
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - Retail £167.99 (£139.99)
Crucial RealSSD M4 128GB 2.5" SATA 6Gb/s Solid State Hard Drive £148.99
(£124.16)
Gigabyte Z68XP-UD3 Intel Z68 (Socket 1155) DDR3 Motherboard £99.98
(£83.32)
Lepa B-Series 750W '80 Plus Bronze' Modular Power Supply £74.98
(£62.48)
BitFenix Shinobi Gaming Case - Black £49.99 (£41.66)
Corsair XMS3 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (CMX8GX3M2A1600C9) £47.99 (£39.99)
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ) £47.99
(£39.99)
Gelid Tranquillo CPU Cooler (Socket 754/939/940/AM2/AM2+/AM3/LGA775/LGA1155/LGA1156/LGA1366) £23.99 (£19.99)
LG GH24NS70 22x DVD±RW SATA ReWriter (Black) - OEM £17.99 (£14.99)
Boogie Bug AimB.Pad XL Gaming Mouse Surface Boogie Bug AimB.Pad XL Gaming Mouse Surface £15.98 (£13.32)
Sub Total : £889.88
Shipping : £12.50
VAT : £180.48
Total : £1,082.86