Cat furniture doesn't have to be too bulky or be an eyesore. Keeping design in mind, it's also important to look for furniture for cats to feel comfortable, secure, and a place to climb/play.
2 of my cats are floor scratchers and the other is a standing scratcher, so it's important for me to have both types around the house. I like to place these next to furniture, so they choose to scratch these instead.
My cats currently use both a top-entry and hooded litter box. Thankfully, they haven't been too picky about it! I find the top-entry ones to be a bit more space saving and easy to clean. However, each cat has their own preference!