Personally, I'd like to see more restored boxcars for the following reasons: (1) Freight train makeup for photo charters and other special events; (2) Extra storage space for parts and materials that need a home rather than shop floors or other clutter areas; (3) Eventually eliminates need for storage containers on site.
As far as the B&SR tank, I would rather see a new flatcar body constructed and put under the tank. Realize that the one boxcar is really in bad shape, but I'd rather save a bonafide historical piece than have a replica. Not to mention, I believe restoration and preservation is part of our Museum's Charter.