I think the vet would have him have an anaesthetic as it would stress him to be X-rayed, it could be that if he's okay overnight, and he goes to the other vets (the cat clinic) that they won't need to anasthetise him for an X-ray, that's what I'm hoping. I guess they would have to seriously stablise him and bring his heart rate right down for a few days before considering their options. I think they would want to reduce the risk of him passing away whist having a chest x-ray.
I can't tell you all how quickly I want tomorrow to come so I can get him to the other vets, I am so desperate for the time to fly, I am trying to find things to do to make the time go faster!