Smoked Porter options

Hi again everyone, I just brewed my smoked porter and it has a really nice smoke flavor, not to strong. I was thinking of adding maybe cherries or a few vanilla beans to the secondary. If I use cherries should it be extract or cherry juice and how much. If I use Vanilla would u just split a few beans and add them to the secondary of soak them in a bit of vodka and for how long and then just pour the beans and vodka in or just the vodka. Again thanks for all the great advice I get for everyone here. Cheers!