Another vote for the 8npa-sli here! Still loving mine, actually need to put some effort in and clock this Turion soon, it's becoming a bit of a waste!
It's a great board and has some really nice features, some pretty advanced overclocking options aswell, many of them scare me...
Like pastymuncher says, it defaults at 2T on the memory for some unknown reason but it really is as simple as just changing the option to 1T and rebooting.
Once I get sorted with moving out, think I might stick in another 6800GS and then that'll be me until my next major upgrade.