I understand they make vinyl shakes that look just like shingles. I've seen it and was fooled. Market data tells me that in your area, having any type of maintenence free siding is a great sellilng feature. Many buyers love vinyl because of the insulation qualities as well.
Contact me if I can help you . I know Rehoboth like the back of my hand.
I grew up in this great town and also sell homes there.