Found on the web a bloke called Ken Rockwell who has heaps of interesting stuff.
Some people hate him probably because he is more successful and bit different but everything I have read on his site seems right. I am preparing for upcoming air shows and learning heaps and I thought I knew just a bit about photography. All digital cameras are much more complex than old film slr's and it appears all future R & D is going into mirrorless so dslr's days are probably limited.
He buys all his own equipment so is not bound to any manufacturer.
Most definitely worth a look. Just google him.