This sounds really exciting, an ideal balance of the best attributes! Perhaps vintage 45's could even better this.

I was actually talking to Marv about this the other day. I'm going to try and track down some "balloon style" 45s that were around in the 30s. They supposedly sound better than many of the later iterations, plus they also look really neat. The biggest problem with the 4-45 though is the lack of tube availability these days. The wells are really starting to run dry.

I'm wondering...

Dynamic headphones and Orthos - 2A3

Only orthos - 4-45

or is it not that cut and dry? I guess the question that I'd like answered is does the HD800 still sound just as magical on the 445?

Reading into Marvey
's post, 445 = best with everything (unless you need more power for speakers)

The 2A3 MKIV is good but TBD if it will match anything until someone actually tries it with the Cinemags. Stapsy and I will try to get our hands on them and roll em in if we can to replace the Hammonds.
 

I don't think the basic topology of the Levi, 445, and 2A3mk4 is that different.  Other than 2A3 vs 45 tubes, the change between the original Levi, 445DA, God 445 and mk4 is the transformers. 

If the Cinemag OPT is the main change between the 445DA and God 445, I think there is a good chance that Cinemag can bring the Tango magic from the original Levi to the 2A3 versions as well. 

From talking with Craig when I first ordered, the 445 platform keeps the excellent 45 midrange and by doubling up on the tubes fixes the bass light character of the 45.  Based on that it is entirely possible the 445 will be superior for that smooth liquid clarity that Marvey describes. 

This is all speculation, but I will say the mk4 with new production Sovteks is REALLY good.  When I picture that, plus 4 EML 45s and even better transformers I am not surprised you end up with God status. 

And if new transformers become available for the 2A3 I will definitely be getting them