I agree about the Acadian House. The north depot is right there, and was much easier to get a bus from than the main depot. The only time I really had to wait much for a bus was at the main depot. I know you are thinking first floor, but I would suggest 2nd, simply so you don't hear the people above you. Even the "parking lot" view at POR is spectacular, as there is lawn and gardens between you and the parking lot.
The Acadian House was a short walk to the food court and pool, was quiet, and has that cool butterfly garden and house out back, along with a nice fountain courtyard out front. I looked at the other mansions, and was very happy that I ended up at AH.