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Hyphens have worked for me in the past in terms of rankings so I dont doubt the "ranking potential" but i stopped using them as much as possible for my users sakes mainly. It does affect the SEO, like it gets broken links since people misplace the hyphen or the link is without a hyphen so another site benefits. That URL length of yours is ok already. Obviously, I would again prefer an easy-to-remember URL so the shorter and more targeted, the better for me. It's a preference thing.

In the end it wouldn't matter that much but I would also prefer using dashes as well.