I second that on the waterview at POR. It would not be worth the money. As for building requests at POR. Here is a great detailed map that may help you.
Port Orleans Riverside Map
We stayed in AB section because of the Trundles, but I really loved it and it would be my choice anyhow. I'd recommend a first floor request especailly if you are heavy packers. There are no elevators. 14, 18, 27 would be great locations. We were in 28 and it wasn't a terrible walk. I rather enjoyed it and there are little shortcuts you can take. I didn't even make it over to the Mansion side but it looked beautiful.
You'll have to report after your trip. I am anxious to hear which resort you like better. I visited the WL and it is stunning. I just don't know if I'd like it better than POR. POR is so relaxing. Have a wonderful trip!