Some of each would be ideal, I agree. I was fortunate in the past to have them both at once, for some time.
3 cats; one slept on our bed, one on the back cushion of the couch and one in the arms of the dog.
One Sunday my husband and I both got very sick with fever and a 24 hour bug. Finally, we collapsed in our double bed and slept deeply. When we woke up, we couldn't get out of bed easily because all 3 cats and a large Irish Setter were on the bed with us, pinning us down!