I feel the same. If my C4 works fine .. why change it out, but if it goes out... then I would do the AOD.
If you decide to go with an AOD, and stay with the B&M shifter...you'll need a special adapter kit for the shifter. I've got one on just sitting on the top of the cabinet...never been opened. I went with a tko instead. if you want it let me know, and it's yours.