Once again Tony thank you for taking the time to write up some great reviews. Luckily I do have some time on my side to make up my mind. I am never a big fan of buying the first generation body - but I do need a second body to travel with at the end of the year and thought why buy yesterday's technology when Canon are now putting all their $$$ in developing the mirrorless body and lenses.

The up side to the mirrorless revolution is of course lightly used 5DIV's are starting to appear on the market at very good used prices and as you suggest a fourth generation 5D might be a better buy than a first generation EOSR.