All the tests are concluding you should go with nForce2 if you're building a new system. Via is in trouble right now. Their stuff runs fine, but it is lagging behind the nForce2 in many areas of performance and features.
Bottom line is you can probably get a KT400 board for a bit less money, and it will run just fine. But the nForce is the way to go in my opinion. However with nForce, the other poster is right, there may yet be some "bugs" hidden since it is a new chipset.
700 Mflops in SETI!