Hi Forodan,
To leap ahead with you, and consider Boromir in Lothlorien. I think it is also interesting that it is in Lothlorien that Boromir reveals that he lost his horse fording the River Greyflood.
Consider that in Rivendell, Boromir revealed that he defended the Bridge across the Anduin. Thus referencing himself as a hero (specifically referencing Horatius). I cannot help but think that Boromir is referencing himself in Lothlorien by revealing that he lost his horse fording the Greyflood.
What is the reference? Well, who do we know who lost their horses trying to ford a river? The same river, in fact, just further up-stream? Yes, it was the Black Riders!
So, will Boromir turn out a hero like Horatius, or a villain like the Black Riders, or just an all-too-human mix of both?
I can't help but think that this is all being pre-figured in Lothlorien. Of course, your comments on Galadriel's interactions with Boromir also indicate this being set up.