Interesting idea Chris! Been thinking about this one for a few hours now and this is what I came up with.
Like everyone else - I like the shape, color and finish of the box. I agree with Gordon in that the use of a finial in a rustic piece seems to be a conflict in styles and probably the main reason why so many here are having problems with the finial (shape, color, texture, etc). The stark contrast between the white finial and the darker color of the wood draws all the attention to the finial. Thats OK if that is your intention. If not - may I suggest using the same color somewhere else on the box - like the second ring down from the top. Just a little something to tie the two elements together.
Last suggestion - shorten the post that secures the box to the base. Lowering the box would give the piece more of a flowing form and feel a little less segmented.
Like I said in the beginning - interesting concept! I look forward to see where you take this!