I would snatch up the 965BE and AM3+ motherboard and then see if Piledriver is going to be a nice upgrade. Unless you would want to go Intel which is going to handle the rendering better.
Intel is a bit too pricey for me, I don't know much about it all but it seems to me that AMD offers a much better price for the same stuff. Is Piledriver going to be useing tha AM3+ chipset? I think this CPU would be nice because it is not a ton of cash to dump on a CPU but will get me by for a bit until I decide to upgrade.