My preference is Penn, since they've been amazing every time I've seen them. I'd rather not do Rothman, because I always feel just liked a rushed number there. I'm lost trying to figure out who is the best. I don't think anyone in the Philly area routinely does the robot assisted surgery, and I would really love to experience that if possible. Bonus (not such a bonus): Need the surgeon to be willing to do a bad knee despite being only 37.