Aiming for the same price point, I came up with:
Vortex Series: 15.6" Matte Full HD LED Widescreen (1920x1080)
Intel® Core™i7 Quad Core Mobile Processor i7-4700MQ (2.40GHz) 6MB -- Same as the one you posted previously
16GB SAMSUNG 1600MHz SODIMM DDR3 MEMORY (2 x 8GB)
NVIDIA® GeForce® GTX 770M - 3.0GB DDR5 Video RAM - DirectX® 11
1TB SERIAL ATA II 2.5" HARD DRIVE WITH 8MB CACHE (5,400rpm)
ARCTIC MX-4 EXTREME THERMAL CONDUCTIVITY COMPOUND (£9) -- Not a bad idea for £9 as this thing may produce some heat
GIGABIT LAN & WIRELESS INTEL® N-7260 (300Mbps, 802.11BGN) + BLUETOOTH
Everything else standard.
£951.67 ex VAT.
£1,142.00 inc VAT and Delivery
TSS knows his stuff and will probably suggest something a little different, but the graphics card is what will make or break it. The difference between the 765 and 770 is £142 with everything included, but there's also a pretty significant difference in performance there...significant enough that the 770 will still be running games at 1080p on high/ultra settings a year after the 765 cannot, I'd expect.
That's the problem with gaming laptops; even the high-end-but-not-ridiculous options aren't spectacular, but if well-built the components of that one should have a nice degradation curve in terms of performance...worst-case with all but the most demanding, you'll be running on high settings in a couple years rather than setting it such that every mote of dust has its own hopes, dreams and personality.