I could have 1 steagadon with a giant bow and another with a blowpipes and another with an engine of the god.... I can have 3. Which should i have?
Depends on your army size I guess. I bought mine in this order: Ancient with Blowpipes... then bought the Engine of the Gods. I was pretty happy with how that was. Engine is a bit of a points hog, but fun.
I have two stegadons. One old one and one of the new ones. I have modded the plastic one so that I can use it for whichever type I want to use. I can also use the old one in the same way.
I suggest you do what I did and buy 2 Stegs, magnetized all the bits and then you can swap them out as needed.