Preferably (and the preference is very, very strong), special make up in black shell cordovan leather with double oak leather soles (black shell cordovan leather and the double oak leather soles are exclusively available "special make up" on the Allen Edmonds Park Avenue).
However, even in black "custom" calfskin leather with single oak leather soles and brown "Antibes" calfskin leather with single oak leather soles, (which are two of three configurations available ready to wear on the AE PA; the other configuration for the AE PA RTW is Merlot "burnished" calfskin leather with single oak leather soles, which I dislike for any shoe, including the AE PA), the PA is still AE's best shoe, IMO.