CP Haifa ia an excellent recommendation.
If you are renting a car, make sure you have good directions, a bit confusing to get to. Nice staff, nice lounge.
Dead Sea recommendations are harder. If you like to sit in "healthy" mud or float for a few minutes in the sea, it is fun. But at 110 F how long can you do that? Obviously the focus should be on the area; Ein Gedi, Massada, the Great Crater and even the Ahava factory. I would just look for a clean place to lay my head along the shore.