The Toyo 45A and All have really come down in price on the used market lately. A good friend of mine has the 45A. It's a great camera. Toyo 45A and All's are made of metal and are sturdy.
I own a Sinar P. It's a joy to use for portraiture. It's big and heavy and doesn't move if you are clumsy like me and bump it. Just make sure that you mount it on a heavy, sturdy tripod.