My vote is for the Air-Way for dusting and floors, and the Kirby for the rugs. What an awesome combination. Keep the Rainbow for when you really want to Deep Clean the house.
Palm Springs is beautiful in pictures. My husband is from Palm Springs, and I can't wait to visit. The mountain looks majestic in the photos. Congrats on your new home.
As an FYI, keep all the bag tops from your Air-Way bags. Just pull them from the bag itself. That way, you can always "make" a HEPA cloth bag for your Air-Way from another brand of HEPA cloth bag (like Simplicity Freedom type F bags). Cut off the new cloth bag right under the cardboard collar - insert it into the air-way, flare open the top of the cloth bag, insert the old Air-Way bag top that you've saved, fold down the edges of the new cloth bag, and close the Air-Way.