If the order status says preparing for dispatch on Amazon then I'd say no need to hedge.I've just spoken with amazon rep on the phone, she said mine will be with me tomorrow and is being prepped for dispatch.
it seems like they have now sold out as if you try and order a new one, it gives 1-3 month estimated lead time for new stock and the price has gone up to £525, mine was £499 + £50 cashback.
Still have until 4 pm to hedge my bets with handtec for guaranteed delivery tomorrow???