If workstation is an issue for you, needing SLI and PCI-X than you don't have much choice. When PCI-X is no use for you, choosing an other board is wise. While the difference between x8 and x16 is only a couple of frames, such boards are much cheaper. The issues with the VRM also is a reason not to purchase this board. We got in contact to ASUS and asked if this is just an BIOS-issue or a bad design, because we have seen such behaviour also on the newly P5K board. When ASUS provides an answer, we will update this article and let you know. Compared to the MSI P6N-SLI Platinum the price is too high.
The ASUS P5NT WS is selling for about €195,-.