Budget gaming computer £750

I am going to be reusing my old cpu and ram and hdd from my old computer i got some components to gather would like recommendation and in the future would like to go SLI

cpu http://www.amazon.co.uk/gp/product/B002SRQ214/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1

ram  http://www.amazon.co.uk/Corsair-CMZ8GX3M2A1600C9-Vengeance-Performance-Desktop/dp/B004CRSM4I/ref=sr_1_1?s=computers&ie=UTF8&qid=1383500022&sr=1-1&keywords=ram

hdd http://www.amazon.co.uk/Western-Digital-Black-Desktop-Drive/dp/B0036Q7MV0/ref=sr_1_1?s=computers&ie=UTF8&qid=1383500175&sr=1-1&keywords=hard+drive+western+digital+black

gpu http://www.amazon.co.uk/gp/product/B00D3LE2MK/ref=ox_sc_act_title_7?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

motherboard http://www.amazon.co.uk/gp/product/B005POPQZA/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE 

dvd drive http://www.amazon.co.uk/gp/product/B007IKS7AU/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

case http://www.amazon.co.uk/gp/product/B003OESTP2/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

psu http://www.amazon.co.uk/gp/product/B008RJZR40/ref=ox_sc_act_title_6?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

cpu cooler http://www.amazon.co.uk/gp/product/B00A0HZMGA/ref=ox_sc_act_title_7?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

gpu http://www.amazon.co.uk/gp/product/B00D3LE2MK/ref=ox_sc_act_title_8?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

 

 

 

and the ssd http://www.amazon.co.uk/gp/product/B009LI7CKI/ref=ox_sc_act_title_5?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

http://uk.pcpartpicker.com/p/1WRSR

replace what you want. you can reuse your DVD drive from your old computer.

Overkill PSU.  Change that to the XFX PRO550W version, and you'll be fine for 1 GPU.