PLease help me decide which red maple tree to plant. I live in Greensboro, NC and the site is in full sun with somewhat clay soil. I am looking for a beautiful fiery red tree with a good shape. I am confused about the cultivars "October Glory", Autumn Flame, or Red Sunset. The pictures I have seen of the "Red Maple" (no cultivar named) seem to be what I am searching for... but have been told to stick with a cultivar. Please help... and thank you!