What a great project, making new front gardens! Part shade is the perfect for your boxwoods by the door, but be sure to twine the branches up in winter to reduce scorch and wind damage. As to the formal style of your home, start with some low-growing evergreens as backbone in your gardens, like some of the dwarf junipers, so you have winter interest. You can even add more box. Then you can plant flowering herbs and flowering perennials to your heart's delight. There are so many plants to choose from in Zone 6. Check the garden plans at www.bhg.com to see which ones please you.