Great comparison video by MicroFourNerds ;)
Preorders:
G9II at BHphoto, Amazon US&EU, Adorama, Fotokoch, FotoErhardt, WexUK.
35-100mm f/2.8 at BHphoto, Amazon, Adorama, Fotokoch, FotoErhardt, WexUK.
100-400mm f/4/6.3 II at BHphoto, Amazon, Adorama, Fotokoch, FotoErhardt, WexUK.
Battery grip for G9II andS5II at BHphoto, Amazon, Adorama, Fotokoch, FotoErhardt, WexUK.