Creating new primary outlook.com address, eliminating old primary msn.com address

I want to retire my primary msn.com address and create a new outlook.com primary address. Eventually the msn.com will be shut down. Should I simply create the new address and add the address i want to eliminate as an alias for now? Should I change the 'respond to' option  in msn.com  to the new outlook address so that any emails people are responding to show up in the new email address?

I was thinking about forwarding emails from the msn.com address to the new address, but this would send junk mail too I think.

I do not wish to rename considering the problems with losing emails, so I'm thinking creating the new address is the way to go.

What do you think?