>Did Araragi come to some sort of conclusion
Yes: to lead a life with Shinobu, come what may, for better or worst to everyone involved. He basically chose her over anyone or anything else (including his own humanity). She won the harem race.
Not sure about that one, but I think it was more of an honoring than rewarding thing she was referring to. The first endured a four century long struggle because he had a resolute wish to fulfill: meet Kiss Shot again; in that sense, to honor him by pursuing a happy life basically stands for understanding that to live happily means, precisely, to live truly to oneself: to find one's true will and follow it to the bitter end. In other words (butchered nietzschean words), that if life is will to power then happinnes is the triumph (i.e. the encounter and pursuance) of the true will, even if its fulmillment means our very end.
Post edited on 25th Dec 2015, 1:24am