the body lens conundrum continues

weight is becoming an issue -- the 1DX is the best body but it is a brick and weighs more -- the 7D2 I just find is erratic in AF, poor ISO and IQ and I just don't trust it even with my 300 2.8 and 1.4 converter which should be great IQ -- so presently on the 5D3, amazing IQ and files but shutter rate and AF less than the 1DX though nice large files to crop from -- thinking of the 400 f4 DO II but the poor close focus puts me off a bit -- would appreciate any comments from anyone who has one -- there seems to have been little new on the net since the initial reviews -- some 7D2's in the British winter -- it seems to need a big target in bright light to work well --