You people are putting way, way to much thought into this.
For the record, I agree with Minx. Having two champs for the week should be better than having just one. If two people are able to get that close, they should both be rewarded.
But if ya'll feel a sole winner must be crowned, I like spectre's idea. Or, what if you just gave the guy/gal with the most points the next week the nod?