I too have been watching the K92 price for a while on Amazon. For a few weeks they were £39.
That price jump was a (seriously unfunny) joke wasn't it? They've more than tripled in price to £127.89!
I bought the AKG K550 model, which were good but I swapped them with an old pair of Sennheisers that I'd given to my brother, which I ultimately (just) preferred when I re-evaluated them.
And that's the point. It depends a lot on what you may have been used to in the way of headphones. So it will be interesting to hear of your findings with the K72, which I think you will find to be neutral and accurate (and good for sound isolation / monitoring)