What graphics card should I get?

PCPartPicker part list / Price breakdown by merchant

Video Card: XFX Radeon R9 270X 2GB Double Dissipation Video Card (£129.92 @ Scan.co.uk)
Total: £129.92
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-12 20:44 GMT+0000

But I would suggest spending another £12's and get this card.

PCPartPicker part list / Price breakdown by merchant

Video Card: Gigabyte Radeon R9 280 3GB WINDFORCE Video Card (£141.99 @ Ebuyer)
Total: £141.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-12 20:45 GMT+0000