If you love the area, I would go for it! I agree with the first two comments on color. A beautiful deep blue, not navy but more gray, would be pretty for shutters. And a front door in some shade of red or burgundy. Also, when you landscape, you can pull shades of the front door color into the shrubs and trees. Since the house is so nice and far from the street, use large groups of the same plants for impact as many different small plants or too many colors will not have the same effect. Same with your new light fixture. Make it substantial but simple. You might consider flanking the garage door with light fixtures, too, instead of over the garage door.
When you have the walkway redone consider built in planters that use stone that looks good with your trim colors and fill them with lots of one-color flowers or small shrubs. Good luck what ever you decide!