We purchased our Columbus 320rs with the 6 way auto level and without the jt strong arms. I'm going to order the strong arms as there is still some movement when people walk around. I should have not second guess myself the first time. I know there is another Columbus owner that did both the 6 way and stablizing arms and said there is really no movement in the trailer. I hope that helps.
We have 6 ways and JT's on our 320rs, we love them very steady, very little movement. Cant really compare much as this is our first 5th wheel, but when we were looking to buy you could really feel the difference!!
Larry & Kerry Jackson
2012 Ford F250SD
2013 Columbus 320RS