For the money , I recon thats pretty much the best combo you could get.
The cpu will be absolutely miles faster than what you have now and I am sure you will be happy.
Plus with the motherboard I suggested you have the option of adding plenty of extra memory in the future.
The main thing is getting a motherboard and cpu that are compatible with each other.
Hope all goes well with whatever you decide to get.
Keeps us posted on how it all goes.
Edited to add - I fitted a new motherboard to my pc last night , after installing it my copy of windows 7 needed validating again. This time I had to call a toll free number , and enter a few numbers then type in some numbers on my pc. After that it was all sorted.
Just so you know.