Simple, who is a better fantasy PG, Devin "FU Cuban" Harris or Chris "steals McGee" Paul? Hypothetically speaking, If the season ended today and the new season started tomorrow, and you are sitting there with the decision to make. Personally, I would still go for CP3, just b/c he has the assists down....but the thought of 40+ pts every now and then from my PG spot IS appealing...
Since Wade qualifies as PG in some leagues the real question is who do you take 2nd. Or really... 3rd. For all you know you'll be taking Rose or Arenas next year.