Aah, okay. You have some nice color on some other goodies out there as well. I see you ended it and as I don't know much about these either I was looking for an opinion as I did like it from the images.
I'm amateur so take this with a grain of salt, but I think that's one gorgeous coin. It seems night and day to me between it and the AU as far as wear. I'd guess it was 65 or 66. I'm in a quandary myself about what coins to grade and what not to grade. I think part of the evaluation is what your plans are for the coin. If you're planning on selling it then you obviously need to factor in the cost, rarity, and what premium you could get for the grade if it comes back as you hope (or better). If you're going to keep it for the next 30 years and then pass it along in the family, grading a coin like this IMHO is a no brainer!