How would an audience interpret Lord Montague's comments about making a statue in gold for Juliet?

To me, there are two ways to interpret this
statement.

First, you could take it as a truly sincere
statement of regret.  Lord Montague is trying to show that he is sad about Juliet dying
and he is trying to show respect for and reconciliation with the Capulet
family.

Second, you could interpret it as a cynical move on
his part.  He might be trying to outdo the Capulets.  He might be trying to show that he
is richer and more magnanimous than Capulet (because he, not Capulet, is the one raising
the statue).  So if you are inclined to doubt Montague, you can argue that he is doing
this to try to show off how rich and how nice he is.