You're right John, this time I'll have no time to visit Luzern or any other Swiss interesting town. I surely am going to do this in another trip, when there will be more time (and money) available. I have never been to Zermatt and Luzern, I have though visited Zurich, Geneva, Lugano and St Moritz in the past. I also plan sometime to take the elevator up the Aiguille du Midi, but that's in French territory, no ?