That looks like a really nice set! Any thoughts of adding some of the special issues, like the 1994 or 1997 matte Nickel or 1998 matte Kennedy? Or even a modern commemorative Half Dollar (the 1982 Washington is always a nice choice: it is silver and can be had for a small premium above spot).
I do miss seeing the GG1 running. I took this at 30th Street Station in Philadelphia. Thats the Philadelphia Art Museum in the back ground