I'm in the same situation, I can't find much reason to run one, but I would love to have one. I might just pull the trigger to have it sit in the yard and look good.
The entire near- to modern CN fleet is now available in n scale, just a few models to fill it out (GP40W, GP38W, porkchop GE units). Who would have thought five years ago that would be the case? There were basically none at that time. Add to that the Pointe St. Charles van, a number of key freight cars (coal/sulphur gons, potash, box cars, gons, etc.) and things are looking pretty golden for those of us who like brooms propped up on our locomotives.