I'm not a massive fan of the colour personally, but that's because I see the peacoat as a classic that shouldn't be tinkered with really. I'd be much more tempted to go for the Frith Peacoat.
That said, these days I'm relunctant to shell out the huge amount of money that Allsaints charge. They have some lovely, lovely pieces but half the time I don't know what I'm paying for, especially when their sizing is so all over the place.
I think they've just got cheeky pricewise. They know people will pay stupid amounts, so they charge stupid amounts.