Well that sounds like SBY will be staying at the Bella Vista himself. If you love contempory art stop at Dr. Oei's house on the way. Its going to be a great day for you and ask the local people at the train station to ride in the extra car as I'm sure you will be in the Queens Car. You won't be sorry that your staying 7 nights at Amanjiwo as there is so much to do and the food is so good.Your in for one of the best trips of your life. So many people miss out on due to their concern of terrorist in Indonesia. I hope you love it as much as I do and look forward to your indepth trip report. Sean is such a pro and Gabriella works so hard and really loves her place and Indonesia.
If one of the options they offered to you was to stay at Losari at the end of your trip and your thinking Losari won't be up to the standards of Amanjiwo then do the train adventure and lunch on day 3 and have lunch and a tour and see if you like it. Its not as slick and polished but its very cozy, authenic, and the staff are very caring. The cookies in the rooms taste like my grandmothers, the gardens and paths are wonderful, and the bath tubs are really small pools. Which ever you choose it will be amazing and remember you can always go back.