I would go with whichever is the warmest grey to compliment the brick. I think that's agreeable grey but couldn't find your third grey.

May be too late, but I have Gray Owl in my family room that is west facing. I don't see green. It is definitely a cool gray at least in my space and remember when I was choosing a gray BM Gray Owl was suppised to be a pretty 'clean' gray.

I have Agreeable Gray and Gray Owl as well as SW Creamy in my house.

I think Gray Owl is too cool. DD picked Sedate Gray (based on chips), but I'm worried it may be too green.