Hi Rex,
Having had both 5 and 6 EQ's I get the 6 and skip the 5. The 6 is bigger but not that much bigger.
My 2 cents FWIW
Now I have gone completly nuts and use an EQ mount that weighs in excess of 150 kgs....and thats with no counterweights or scope on it...and I love it and it is still transportable, just takes time to set up