@Dale can you list what parts you have at the moment as some money could be saved on the gpu side if you wouldnt realy be getting an upgrade
@Dug That bundle isnt all that great, you can get better for the same money.
3770 + Gigabyte GA-B75M-D3H + 8gb 2133Mhz comes to the same price as that bundle and im
pretty sure it would win, Hyper threading + slightly better core architecture so faster speed for speed + faster memory
Also you can get 560Ti 448 cores for £40 less than the 560Ti you linked
http://www.overclockers.co.uk/showproduct.php?prodid=GX-177-MS&groupid=701&catid=1914&subcat=1854