I'm swapping parts from my motobecane to my new Transition Transam 29!

I am currently running a 120mm Reba, 2010, that I just swapped the lowers on to go from 9mm to 20mm. I was thinking that a 140mm fork would be nice, but noticed that RS only makes the Reba in a 100mm nowadays, so I would need the revelation, which also has 32mm stanchions. Are there any benefits in switching, besides additional travel?

I don't really mess with my fork much, just keep the air so that I have an inch of sag.