This is what you have through the configurator:
YOUR BASKET
1 x "Titan Bayonet" Intel Core i5 4690 @ 3.9GHz Turbo AMD Radeon Gaming PC £286
1 x ESET Smart Security - Trial Key £0
1 x No Sound Card Upgrade £0
1 x Samsung 120GB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive (MZ-75E120B/EU £74.99
1 x Seagate Barracuda 1TB 7200RPM SATA 6Gb/s 64MB Cache - OEM (ST1000DM003) HDD £42.95
1 x Sapphire Radeon R9 280 Dual-X 3072MB GDDR5 PCI-Express Graphics Card £155.99
1 x Intel Core i7-4790 3.60GHz (Haswell) Socket LGA1150 Processor - Retail £249.95
1 x Corsair Carbide 200R Compact ATX Case - Black (CC-9011023-WW) £49.99
1 x No Operating System £0
1 x OcUK Standard System Warranty - 3 Year (24 Month C&R + 12 Month Labour) £0
1 x Standard Build Systems - Dispatched within 7 working days £0
Total : £874.86 (includes shipping : £12.50).
Or you can pick out the parts. Something like this:
YOUR BASKET
1 x Intel Core i7-4790 3.60GHz (Haswell) Socket LGA1150 Processor - Retail £249.95
1 x MSI Radeon R9 280 Gaming 3072MB GDDR5 PCI-Express Graphics Card £149.99
1 x Samsung 120GB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive (MZ-75E120B/EU £74.99
1 x Gigabyte Z97P-D3 Intel Z97 (Socket 1150) DDR3 ATX Motherboard £62.99
1 x SuperFlower Golden Green HX 450W "80 Plus Gold" Power Supply - Black £49.99
1 x Corsair Carbide 200R Compact ATX Case - Black (CC-9011023-WW) £49.99
1 x Kingston HyperX Savage Red 8GB (2x4GB) DDR3 PC3-19200C11 2400MHz Dual Channel Kit (HX324C11SRK2/8) £46.99
1 x Seagate Barracuda 1TB 7200RPM SATA 6Gb/s 64MB Cache - OEM (ST1000DM003) HDD £42.95
1 x LG 24x DVD±RW SATA ReWriter (Black) - OEM GH24NSC0.AUAA10B £13.99
Total : £756.83 (includes shipping : £12.50).
And ask OcUK to build it for you (for approx. £60) for a grand total of £816 or so. And that way you have room in your budget for a copy of Windows too, unless you already have one?
The Titan Bayonet also brings a Prolimatech CPU cooler but doesn't say which and I doubt it's worth the £60 difference between the two specs.
But before you take the plunge either way, is this going to be mainly for gaming and then general usage?
An R9 290 would be within reach if you opted for an i5. On average there's only 1-2 FPS difference between i5 and i7 at gaming. The bigger FPS gain is with a more powerful video card. In fact, an overclocked i5-K will be faster for gaming than a non-K i7.
YOUR BASKET
1 x Gigabyte Z97X-SLI - Devils Canyon Core i5 4690K Bundle **£12 Saving** £277.98
1 x Powercolor Radeon R9 290 PCS+ OC 4096MB GDDR5 PCI-Express Graphics Card £221.99
1 x SuperFlower Golden Green HX 550W "80 Plus Gold" Power Supply - Black £59.99
1 x Corsair Carbide 200R Compact ATX Case - Black (CC-9011023-WW) £49.99
1 x Kingston HyperX Savage Red 8GB (2x4GB) DDR3 PC3-19200C11 2400MHz Dual Channel Kit (HX324C11SRK2/8) £46.99
1 x SK Hynix 128GB SSD SH910A SATA 6Gb/s Solid State Drive (HFS128G32MNB-2201A) £44.99
1 x Seagate Barracuda 1TB 7200RPM SATA 6Gb/s 64MB Cache - OEM (ST1000DM003) HDD £42.95
1 x LG 24x DVD±RW SATA ReWriter (Black) - OEM GH24NSC0.AUAA10B £13.99
Total : £773.87 (includes shipping : £12.50).
Or this:
YOUR BASKET
1 x Pre-Built Upgrade Bundle - Gigabyte Z87-HD3 / Intel Core i7 4770K / 8GB Kingston HyperX Genesis 1600MHz £359.99
1 x Powercolor Radeon R9 290 PCS+ OC 4096MB GDDR5 PCI-Express Graphics Card £221.99
1 x SuperFlower Golden Green HX 550W "80 Plus Gold" Power Supply - Black £59.99
1 x Corsair Carbide 200R Compact ATX Case - Black (CC-9011023-WW) £49.99
1 x SK Hynix 128GB SSD SH910A SATA 6Gb/s Solid State Drive (HFS128G32MNB-2201A) £44.99
1 x Seagate Barracuda 1TB 7200RPM SATA 6Gb/s 64MB Cache - OEM (ST1000DM003) HDD £42.95
1 x LG 24x DVD±RW SATA ReWriter (Black) - OEM GH24NSC0.AUAA10B £13.99
Total : £808.88 (includes shipping : £12.50).
i7-K (not the very newest but faster than the i7-4790 as it's overclockable) + 290 for around £870 after build fee.
