CPU/HSF: X3 440 and Coolermaster Hyper 212 Plus
$97. If you don't want/need the HSF, drop it out to save $22.
Mobo: Gigabyte GA-770TA-UD3
$80 after rebate
Total: $177 w/ HSF, $155 w/o.
I've got that HSF on my current build, it is pretty slick. If I am not OC is that overkill over the stock set up?