The Sinar should allow you to do pretty much anything you'd want to do except carry it easily. Not sure what you mean not sitting flat to allow lower angles, though. What sort of photography do you want to do? The Crown has pretty minimal movements...maybe OK if you are doing mostly landscapes at a distance, but I find that I use more movements than that. Personally, I wouldn't choose either camera and would go for a field camera (Tachihara, Chaminoix, Shen Hao and others) just to get reasonable portability with reasonable movements. I shoot almost entirely landscape and architecture. If you are doing mostly studio and still life, I'd go with a monorail like a Sinar. If you shoot mostly handheld, the Crown is a great choice.