If you would sign up for the CC then you get 15 nights towards gold.35 nights in Marriotts=not hard to do.
Then put all the room expenses on that card.
And while gold is better than silver it still is not all that wonderful.
Breakfast pretty much only on weekdays(few full service prop's maintain open lounges on weekends)and you still will recieve the same cr**py service that you enjoy as a silver.It is"The Marriott Way"after all