Well he said he'd post something about the SRH1840 before he leaves for CES, while not saying any such thing about the HD700. Meanwhile, he's now at CES, and we have a review of the HD700 yet nothing about the SRH1840. Also he said the HD700 was his most listened-to headphone lately. So I think it's safe to say the HD700 likely his favorite. Unless he's holding out because he has something very surprising to say about the SRH1840s. Ultimately we won't know until we hear more about them.
Honestly though I was/am really hoping the SRH1840 would destroy the HD700/HD800, mostly because it's disgusting IMO how hifi audio products are priced nowadays. $1000 for an HD700... $1500 for an HD800... and everyone knows they don't cost even a tiny fraction of that to manufacture. It seems the trend in hifi audio is simply to increase prices exponentially over time and never stop.
Quite frankly the HD800 has become almost like Dr Dre Beats for middle class old men. It's absurdly overpriced. Everyone knows it. However it's an over priced product that happens to be among the best, which is why they get away with the pricing. You can pay $30,000 for HE-90s with arguably not even that much improvement over other headphones, yet people get away with it simply because there's nothing better. I say this price inflation is just about as bad as the Beats overpriced phenomenon.
But again, for those who want the best audio, there's not much that can be done because it's a monopoly of the flagships. So I still do hope that Shure or some company comes along and offers some serious price/performance competition in the arena of the flagships performance, and forces companies like Sennheiser to cut the stupid price of HD800s down to something more realistic and/or morally priced.