i5 4690k - £162
Noctua NH-D15 - £76
Gigabyte GA-Z97X-Gaming 7 - £131
TeamGroup Xtreem LV 16GB (2x8GB) DDR3 PC3-21300C11 - £140
Corsair AX860 - £128 (for future SLI/Xfire)
Samsung 840 EVO 500GB - £165
WD Black 1TB - £56
Corsair Graphite 760T - £134
GPU - Radeon 7970 - Already owned
OS - Already owned
Optical drive - Already owned
Total = ~£1000 (prices are rounded)