Well, the trouble is that skt939 boards are becoming increasingly sparse in the marketplace, whcih is strange because they're not exactly out of date. The move to ddr2 on the am2 wasn't exactly a mind-blowing performance increase, and gains moving from my current setup to a core2duo setup still aren't so big as to make my computer obsolete.
An e6600 gets 2136 on CPU 3dmark06. (admittedly, this is stock) Mine gets just over 2000. Now, I'm not saying this is great, but it's not like I'm using a socket A or a pentium 4.
But if I were to buy another one now, the a8n32-sli does look pretty nice. It has passive cooling on the board, and 2 x16 pci lanes, and is a good OCer.