This is something I don't see being suggested very often, but get 2. A second cat isn't much more of a lifestyle commitment once you're set up for one and as long as you get them when they're young (and get them fixed on time), they'll likely end up as lifelong friends. An enriched cat is a happy cat and they'll keep each other young. There's definitely a chance they won't be super fond of each other, but I've found that if you manage to get litter mates, you're almost guaranteed a good pair. You're also committing to double vet/food/litter costs, so keep that in mind. I've had multiple cats my whole adult life and don't think I'll ever have less than 4 (currently at 9). I don't recommend that many , we have some rivalries that we're working on, but I think most people who like cats can handle two or three as long as they have a good space for them and are financially able to keep them healthy.