Fans won't have to look hard to find some of the NFL's top talent. From offense, to defense, to special teams, there will be an abundance of it on display when the Patriots host the Chargers in the AFC Championship game at Gillette Stadium Sunday. If the Chargers are to pull the upset, they'll need to be on the plus side of the turnover differential, as they were in last Sunday's upset of the Colts. Yet forcing Tom Brady into mistakes is one of the most challenging tasks in the NFL today, so that - more than anything - will be the game within the game. We take a position-by-position look at the teams, and let you decide who has the edge. (Text by Mike Reiss, Globe Staff)