I have read all the information I can about the various options and what we should buy, but still confused as to the best option. We are flying into Zurich, taking the train from the airport to downtown Zurich for a few hours and then back to airport. We then are taking the train to Wengen for three days, and will also be taking the Top of Europe train up to Jaunfraujoch. The only other train travel we expect is the return trip to Zurich four days later to fly to Venice.
Any advice?