My MBO is Asus M2N-MX
(it doesn't support AM3 cpu), and i am planning to upgrade to Asrock A770DE+
(AM2+/AM3 support, DDR2). This way i can keep my DDR2 ram and my Blacky CPU until i upgrade to an AM3 quad.
I'll probably get the board for Christmas and I'll get the quad when new games come, because i play just COD: MW2 now.