From what i've heard, the latest PC-7+'s have 2x 120mm fans, but they are packaged in the old boxes (which say 1x 120mm + 1x 80mm), and so OcUK can't be sure about the layout without opening every box. Nearly everyone seems to be recieving the 2x120mm ones now though.
Akasa Ambers are ment to be a fair bit quieter than the fans that come with the case, more so at low voltages.