I need a quote from Hamlet play that would support that Hamlet makes a choice to kill Claudius and sacrifice all he holds dear by transforming his identity in a noble effort to avenge his father’s murder.

Consider Hamlet's vow for vengeance after the ghost leaves:

Remember thee! Yea, from the table of my memory I’ll wipe away all trivial fond records, All saws of books, all forms, all pressures past That youth and observation copied there, And thy commandment all alone shall live Within the book and volume of my brain, Unmixed with baser matter. Act 1 sc5