I have used the Quality Cage, Ferret Nation, Critter Nation and the Martin's Chinchilla Palace. Quality Cage is really nice and the pull out pan is awesome, plus a great stand on wheels, but I really like how the Ferret and Critter Nation doors open to the full size of the cage and the bass pans are great (you can request Bass to make the cage pans 3" high instead of 2" to help keep the shavings inside the cage). I like the Critter Nation or Martin's cages for breeding, but I would still get the metal pans from Bass (Martin's Cages come with plastic pans too). Also the Martin's cages do not come with a stand on wheels like the other 3 cages and I do not like their metal ramps and shelves so I take them out.