In all honesty, I don't think the saga works either way 4-6,1-3, or 1-6, cause the first trilogy you watch spoils almost everything in the second trilogy. Think about all the stuff we knew about the PT going into, and think of a new viewer watching them 1-6 and actually being one step ahead of the characters in terms of what they know!

The biggest flaw of this whole saga idea by George is tying the trilogies together, and I don't think overall it will ever work whatever way you watch them. Sure there are diehards who will say it works 1-6, or vice versa, but I say they weren't written in a linear fashion, so how the hell can you watch them in a linear 1-6 fashion. As for 4-6,1-3, the OT was written with a totally different context of how Lucas rewrote the story, or the 'tragedy of Anakin Skywalker' is now, so there is a jarring effect between trilogies.

It is a shame cause as much as I think the PT is average I have tried and tried and tried to watch it 4-6,1-3 or 1-6 or even 3-6 as ROTS being a prologue to the OT, and it is just too jarring in every sense of how they were made. One trilogy has 95% CG locations, and the other has real locations, that is a huge leap from watching one to the other, and it just doesn't flow either way. No matter how much Lucas keeps updating the OT, it is never going to blend well with the PT, cause they would literally have to reshoot all backrounds and put in full CG locations and somehow cut & paste in Han, Luke, Leia, etc.

I don't even care what anyone says about what order works best anymore, cause either way ruins the other trilogy. The only way it could have worked is if Lucas actually told the PT movies through flashbacks in the post ROTJ days as maybe bring back Mark Hammill telling his son about Darth Vader, The Clone Wars, the death of his grandmom, etc. Then watching them 4-6,1-3 would work cause the PT would be a true backstory of information, not a linear story.

Godfather II did it to perfection as it mirrored flashbacks all through the movie of young Vito Corleone and how he came to power, and it never made you look at Godfather I in a different way, cause Coppola released a recut version in 1977 of everything in chronological order, and it just didn't work. The problem with the SW saga is it didn't make the backstory a true backstory like Godfather II to begin with to fall back on when the chronological order didn't work.