[Lathriel]

I think Faramir would be a better leader because he has more common sense and inteligence then Boromir. However he always struggled with the fact that Denethor favoured Boromir. I guess Denethor send Boromir because he knew Boromir would probably try to take the ring which is what Denethor himself would have done. Also Denethor overlooked the qualities in Faramir or he simply didn't try.

Note: When Denethor send Boromir to Rivendell he was already looking in the Palantir