I haven't tried the older 784 to the Xp model but other Dobyns extreme older rods seem softer than the XP models that I have. The old 703 seems very similar to the 702 XP.
The warehouse is located in Sulfur Springs and he might have a couple of the older ones there. He has a ton of used rods to choose from.
I have two of the older 874's and I agree, they are a fantastic C-rig rod.
The soft tip is what I like about the 784 ml, it almost seems to light to you figure out it's not, its alot softer than the 804 which I break fish off on hook set with