We are considering booking the Douro w/Madrid & Lisbon. We have never been to Spain or Portugal. We plan to fly into Barcelona for a few days on our own there, then take the train to Madrid to meet up w/Tauck for the tour. We will only be able to extend/use our GoT on ONE end of this trip - either Madrid OR Lisbon. For those who have been to both towns, which town would you extend in & why? Thank You.