That being said, these three QBs all have their strengths and weaknesses. Ben and Eli are ranked above Rivers for now because they both have rings, but I think Rivers can get one in the future as well.
What I like about each QB:
Ben has a strong arm, mobile, and can make something out of nothing (that Eli escape in the Superbowl is something Ben does every game).
Eli has great pre snap reads. He's further along than Peyton was at this part of his career. In fact, it was his great reads that neutralized the Patriot's pass rush and blitz attack.
Rivers won't wow anyone with his physical abilities. He just has a do or die mentality. Where most QBs succeed by being composed and calm, Rivers thrive on being emotional and excited. The guy just wins for some odd reason even when he shouldn't like the Titans game earlier in the year where he injured his left leg and we were down by 14 points in the fourth quarter.