Hey man I have an aqua terra with the 2500C movement and the D is even more robust. It's an awesome designed movement that you will be happy with. The PO is a cool watch and I think the 2500D PO is a great value for what you get. I don't know what variations of the 2500 the PO came with but IMO if you find one that is 2500C, don't write it off. The hype over stoppage is over discussed and even if it does stop, all it needs is to have the pallet fork cleaned!!
GL with your search.