I would have thought that Titan would have been more ideal. The atmosphere is mostly nitrogen with a bit of methane, and at bearable 1.45 standard atmospheres. Sure, it's chilly over there (-180°C - BRRRRR!) but there's also plenty of water-ice to be had as well.
... Wonder what'll happen if you aim a bunch of solar reflectors at Titan...
... Wonder what'll happen if you aim a bunch of solar reflectors at Titan...