So reading between the lines it sounds like you rank as follows:
Mandarin Oriental
Ritz Carlton
Taj Campton Place
Fairmont
I would concur thought IMO the Fairmont is so antiquated it doesn't even belong on the list. Ditto for Mark Hopkins, also horribly antiquated, would never stay there again.
Personally I would add the St. Regis and place it at the #1 slot. St. R and RC also offer points in major programs which is a big plus for me at these rates
Not sure if location factors into anyone's decisions. If you have business downtown the Mandarin, Campton and St. Regis will likely be walking distance from your office. I am not a big fan of the Nob Hill location (Fairmont, Ritz, Mark) but may not bother you if don't mind climbing hills and taking taxis everywhere.
Also interesting to see Four Seasons missing from the list, which has a convenient location on Market St.