If, and it is a big IF, the Giants might even consider resigning Plax or Smith, ego's would really have to be put aside. Let's not forget Plax basically said he could not play for TC again and Smith basically slapped Reese in the face by not even coming back to the Giants to match his offer from the Eagles. We have to know Reese will not forget that.
As World Champions, we hold most of the cards. Players now will want to come to play for us as we have that title to offer.
If, and again, a big IF, we were to even consider one over the other, I would go for Plax. he can do a lot more than Smith and we know he is healthy. I think his 'big man in town' days are over, and if he and TC could be in the same locker room, he offers a much great upside than Smith.
That said, I just do not see either of them here. They both had their chance to earn another ring and chose money over team, so screw em now.