What is the best board and DDR3 ram 4GB for £120

Hey everyone, for this christmas coming, i'm looking to upgrade my memory from my current 2Gb OCZ DDR2 memory to 4GB's of ddr3. My current board is a DDR2 only and I want to increase my overall performance, especially in games, and i have been told that more memory is a highly contributing factor of gameplay quality/ fps rates. I also need to get a new board to support the DDR3 capabilities. My current graphics card is an XFX HD4890 1GB card and I do not want to upgrade it. So if anyone could give me a good pair of 4gB DDR3 Sticks (preferably 2x2GB but it's not vital.) and a good LGA 775 board to support my Core 2 Quad 2.6GHz. Thanks!