Wait as long as you can. Both the AMD Bulldozer and the new Intel sandybridge/2011 mobo will be out. Amd around next week or so from the latest I've read. And the new intels not long after that. Then the prices of everything below that will drop even more.

AS an example. Right now I can get an Asus Sabertooth 990FX/ Phenom II X6 1100T BE combo for around $380. That will drop a good $50 as soon as the new stuff is released. More by the new year. That will be the same for both AMD and Intel.

Also the longer you wait the more real info will be available as real users start buying and posting.