The Venus 12 is also a pretty good heatsink/fan for AMD 64s from what I have read.
The difference between 754 and 939 sockets isn't much, the 939s are more expensive I will admit, but they generally perform better than the 754. Also, AMD has basically decided that the 939 socket 64 bit proccesors are the right way to go, and they have pretty much stopped manufacturing 754 and 940 socket proccesors, so if you get a 754 socket motherboard, it won't support any newer 64 bit proccesors if you ever wish to upgrade.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w