I'll need more info than that...knowing the serial number of a CPU is pretty useless.
What is your processor model ? Core2Duo ? Core2Quad ? Corei7 ? For example, my processor is an Intel Core i7 920.
Also, what is your budget for your new motherboard ?
Thats not the serial number - thats the model # and you can look up every detail you need right on intel's website.
Oh, I did not know that ! Thanks for the info.
To return to your question, if I were you, I'd also upgrade my processor. Simply buying a new motherboard will offer you no performance upgrade. You can look here for CPU/Motherboard combos.
If I were you, I'd probably go with a LGA1155.