Hi I am looking to upgrade my PC and am after an Intel Quadcore / i3 or i5 setup including motherboard, CPU and Ram. Can you post what you have and I will let you know. I am located in the UK.
You can build a new i3-2100 machine off of ebuyer.com for 400 pounds. Or upgrade just your motherboard, CPU & RAM for 227 pounds. I would go ahead and get an i5-2500K machine, but that costs an extra 80 pounds.