I like the way this tree has progressed.
When you choose the display pot, I would go with a blue, or dark blue glaze. This will make both white flowers pop and nicely contrast with the red fall foliage. To me a red pot would compete with the fall foliage. So blue shades and green shades would best compliment or highlight both your spring color, but also your autumn foliage. It is potentially a gaudy tree, you could go bold in your choice of a blue or green, fairly vivid will work. Though some prefer more subtle tones.