Welcome to Flyertalk! I would look into opening another Citi AAdvantage personal card. There are still 50k offers out there and they have 2 separate products (visa/mc). I have both and there is a thread outlining how much time you should leave between applications.

Also, you can always do an AMEX Plat personal or business (or both!) for 50k. I would personally wait until a 100k offer comes around. Chase United Explorer has a decent offer if you don't want to apply for another Ink Bold.