I also echo the whole dead-endedness of the historical angle.
I see fine arguments for both sides, though I tend to feel like the Orthodox side has a bit more history on their side, based on the overall lack of any consensus on Roman Primacy. It;s confusing, anyhow. That said, I am no firmly convinced that no amount of reading ECF quotes, Orthodoxwiki articles, independent articles, or any other research can give you God's will. It's got to be about prayer, and what feels right, in that way, that truly matters. Not what feels intellectually right, not what seems neater, not which one has cooler art, or better novelists, none of that. The question is really, where is God? The problem, or perhaps blessing, is that I'm quite certain that though one side must be the true church, He must have been in both at some point, and surely didn't just pack up and abandon wholesale the entire body of believers who fell on the wrong side of the schism.