Hi All,It is my first post after introduction and need your expert advice.In order to cover the complete coverage of an event, I want to buy a second camera and don’t want to swap lenses.Currently I have Canon 5 D Mark III with 2 lenses both f2.8 24-70 & 70-200mm IS II.Please advise - what type of second camera should I buy? How about 7D ? Buying another 5D is out of picture.- Which Lens should I use on which camera?