ASUS's P5K motherboard has definitely shown that it is a very capable board with good overclocking results for a mid-range board and with a lot of additional features onboard.
ASUS has put a bit of extra work onto their mid-range boards in recent times, and why not since the battle between them and GIGABYTE is fierce once again due to the recent joint venture falling through. It's good to see boards being designed with a purpose and providing what the end users want.
On the downside, while making a good board in performance it still lacks some design functionality. The COM port connector should have been placed at the bottom of the board where the IDE port is and vice versa making it easier to setup.
Overall we would consider this board as an alternative to the expensive P35 options out there, and with X38 now on the scene P35 boards will drop in price making this board look even more attractive.