The difference in price and performance between the M10 and M10S means the M10 is a much better purchase at the moment.
M10   2190w @33TH: 66w/TH
M10S 3575w @55TH: 65w/TH

Apart from that these machines are excellent and so far I'm very happy with the service received from Pangolin.

In case anyone out there is thinking of buying I can source excellent prices for these regardless of the end destination.
Just to be clear though: I will never ask you for money, you would always deal with the sales outlet of the manufacturer (Pangolin Miner) directly.