I'm selling some real-estate, and in a few months may be in a position to buy a double. From your list, I would go with either the 450/400 3", or the .375 Flanged. If possible, I'd like to get an extra set of barrels, so that I could have both calibers. The gun would be a fairly utilitarian grade, I don't need fancy engraving. But, I would like QD scope mounts on it, and a nice case to house it.