Jun 21, 2010 - 11:20 AM
My personal view, Get a swiss pass, for 2 persons, enjoy 15% discount. It is much cheaper then taking day tours. Switzerland has the best, efficient transportation in the world. You will enjoy taking the trains and convenient plus freedom of swiss pass.
Due to your limited days, Bernese Oberland can be your base for many exclusions - Jungfrau, Schilthorn, Grindelwald First, Lauterbrunnen, Interlaken Ost - all near each other, travelling time is reduced. Due to your limited time, again, my personal opinion is if I go Jungfrau, I will opt out Schilthorn (both seems similar, but I still visited both). When I have extra 1 more day, I will go Lucern.
If you go Junfrau, make sure you are not susceptable to High Altitude Sickness. It can be very sick.