As I've said before, it can't be just bpa or just need.
Teams that have grabbed the "wow" player haven't been able in many cases to be highly successful with that player, i.e. the Bears with Mack, or the Texans with Clowney (though I really think he was so highly rated based off that one sack/tackle that got so much air play) or others. Some have been of course, but the point is it's seldom a good decision to go just with the "wow" player or just the need player. Have to temper your decision with input on both criteria...