If you want 650i, I'd suggest the MSI P6N Platinum. Forget any products with the name Fatal1ty on it. You're just paying for the name.
It would be better to get 2gb of PC2-6400. You don't need 4GB of RAM, unless your doing CAD, graphic design, or video editing.
The CNPS7000 is compatible with socket 775, so it's fine.
edit: Actually, you have to buy a Zalman ZM-CS1 clip, to install it on a 775 motherboard.