best large prize clownfish to be hosted

Im in the process of setting up my first ever reef system , which is 30 gallons
and i really want a single largish beautiful clown that will live on its own with an anemone , so am looking for some input on my situation.
Also could you possibly specify what anemone would be best considering i am a beginner in the hobby, and i wouldn't add the nem for up to 4 months in.

Thanks a lot