I would apply and get the card you want first.  If the card you have does not have any annual fees I would consider keeping it open. One it does not cost you anything..  Also, you the account  couple times a year  to keep the account active.  Doing so will continue to help build your credit history. Also you have a secondary card  just in case something unexpected happens. I am doing a similiar thing with one of my credit cards I use 3 or 4 times a year for a small purchase.