I love large format, but I'm looking for a good medium format camera where a 4x5 handheld would be inappropriate. The camera can be a bit heavy and big, so long as it is good for portraits as well as still life and landscapes. A built in meter is not necessary, but if it has one, I don't mind, so long as it works. I know Rolleiflexes are the cream of the crop, but I'm looking for something that is in less demand. Basically, a beater MF camera that I can lug around and not worry too much about. I love shooting wide open, so it has to perform decently in that regard. Ideally, it should be less than $300. Any suggestions?