If minimalist style is your thing, there are ways to make your holiday decorations reflect your sleek, modern decor. Try these Incredibly Chic Modern Minimalist Christmas Trees as inspiration (they're also alternatives to christmas tree stands!
But if the rustic box isn't your style? A wicker basket. A silver tray with lower sides. A glass bowl with moss up the sides to obscure the "mechanics" of the arrangement. A decorative ceramic serving dish. I love the subdued green and white look.