Screw the Caviar Green go for Blacks, or at least Blue...
For about $300 consider moving to a 6 core AMD
for ~200 go for the MSI 890FX
theres combo deals for 6 core and 870/ 890 boards out there
radeon 5850 ~300
btw where are you getting your prices - they seem a lil out dated... (not to be rude)