I am pretty sure it is neither. Read on these forums, and you will see people getting crappy oc's on their Venice cores. 2.4 seems to be what you are "guaranteed" and not much more. What I am saying is that you should never count on a godly oc when figuring in your budget, especially if you are trying to keep it cheap. Buy the fastest that you can with the money you have, any OC will just be icing on the cake and you don't have to about having weak system performance. If you have loads of cash, that is when you can afford to get several different chips and find the one that works the best, or at the very least have the resources to be cross shipping. No one likes to be without a PC.
Besides all of that, he only really needs a 3200+ or so on either platform to unleash that 6800NU, any more than that is pretty much overkill in my experience. I know we all relish that here, but realistically, more is not really necessary to see a big performance jump.
And to top it all off, I find that S939 NF3 and Via boards are rather quircky by nature, and many of the socket 754 ones seem very mature and are cake to set up, especially if you don't want to spend hours stress testing and tweaking your oc.
Nat