Don't mean to be a naysayer, but once you put Palmach Museum in your "Top 10", then what about the Haganah musuem, the Etzel museum, the Lechi musuem, the Tzahal Museum, Yad Lashiryon Tank museum @ Latrun, IAF museum in Beer Sheva, etc etc... The list doesn't end! I really honestly do think that all the aforementioned are awesome places, however if a VIP or a group of professionals come to IL and you have to get down to ~10 specific sights to see =top 10, I wouldn't put any of those on the list. They're very important, and I highly recommend them, but just not that important IMHO.
The only museum's which are a must are Yad Vashem and the Israel Museum (Bible Lands museum which is a few feet away - right across the entrance, wouldn't hurt). The City of David/Davidson Center/Southern Wall excavations would/should probably anyways be incorporated in a visit to the Kotel and Kotel "tunnels".