Definitely get what you want. Any of them will look great, but it reflect YOU, not the church or hall you are playing in.
My teacher had a bias against ebony finished harps. So for a long time I only had natural or mahogany finished harps even though secretly I really liked the ebony finish.
The last time I purchased a harp was about three years ago. I was without a pedal harp for a long time and really wanted one again. But this time I just got what I knew I really wanted. I feel far more comfortable behind my ebony finished harp now than I ever did with any of the others. It just looks right for me. And I get far more compliments on it’s looks than I ever did with any of the other harps I have had (with the possible exception of my electroharp which is blue with gold highlights, but that is kind of a special case).
I’m not saying to get ebony. But get what you really want. It is YOUR