Not everyone has problems with the Nforce boards. Dont get me wrong...THEY ARE GOOD BOARDS!! I personally have had no problems with the Via based boards from the 266a chipset through to the 400. The problem with the Nforce boards shows up when using certain brands of game controllers ( Nvidia says it isnt their usb controller and the peripheral manufacturer says it isnt their usb controller:rolleyes: ) is easily fixed by using a pci usb card. Simple but has caused massive headaches until the problem was solved! If you dont want to push the FSB of the processor you cant beat the MSI boards. If you want to seriously get into O/Cing look at Epox and Abit Nforce based boards. Really it all boils down to personal preferance and what onboard features you want/require, and price that should dictate the MB manufacturer. I dont think you will go wrong with any of the major manufactures. I was just stating MY preference and the reasons for them, and letting people know that if they are having USB game controller problems to try an add in pci usb card for the Nforce boards, as this remedies the issues.
Good luck with your machine, and you cant go wrong with either a KT4 or Nforce board from a good manufacturer, and if you still cant decide pick the board with the coolest colour pcb!!:D ( That is one of my pet peaves with Asus..that damn beige just looks soooooo dated!!!! LOL)