Apr 14, 2011 - 9:58 AM
Hello shibatosh. For a rather short 5 or 6 day stay, I would personally prefer to stay located in one town only and make some longer trips from there. I'm not sure how important the trip to Montreux is for you. It's a beautiful train ride though, especially via the Golden Pass route, and if you leave early you will still have time to explore Montreux. The same goes for Lucerne. In all, it's a matter of personal preference. And as Arno said: there's so much to do and see in and around Grindelwald, that you will by no means get bored even if you stay put there during your entire stay.
Jungfraujoch and Titlis are entirely different, so in that sense you could easily visit both. It the train ride to Engelberg turns out to be too long, you could opt for Mt. Pilatus instead, which can be reached from Lucerne and offers great views too. If you want to narrow your choice down to only one viewing point, I would advise to up to the Jungfraujoch. It's close to Grindelwald and provides an amazing view of the Aletsch glacier (provided that weather is fine of course).