The Russian Monarchy took things to a level, though, that I wouldn't be comfortable with, even disregarding the blatant Caesaropapism. The fact that the Tsar was allowed to go through the royal doors to recieve the eucharist, for example, is something that makes me twitch. I could be confused though, as the doors separating the Narthex from the Nave are also called the "royal doors." Issues with translation and misnomers between Greek and Russian.
And I'm a monarchist.
I would, of course, be willing to hear further arguments in favor or against it.