I have the P6T Deluxe v2 which is basically the same board as far as I can tell. Its a good board and overclocks well (though not as well as the newer 220MHz BCLK boards like the Gigabyte X58A and the ASUS P6X58D-E), and its best feature is that it has a wide space between the two main graphics slots.
This means two dual slot cooled cards can run side by side with a decent bit of room between them. It also means you can run two triple slot cooler cards together.