I actually want Ryu as well, so I'm agreeing with you that he's the next best option. But Ryu is probably more likely to get injured. It is true that they've missed the same amount of time due to injury, but based on their injury histories, I would say Ryu is more likely to miss time over the next couple of years.
That being said, I wouldn't worry about that at all. He was fairly healthy last year, and we have reserves coming back from injury to fill in for him if he does go down.