I am on a 140mm 29er Revelation Dual Air an my Trail/AM 29er, 20mm Maxle version.
I like the fork. It is light and relatively plush. It has the dual flow rebound damper and a regular MoCo with Floodgate for compression.
I am 175 lbs and it is sufficient. While braking there´s quite a bit of flex going on. But it is very rideable.
With the Pike on the horizon and the 34 in the shops already, I definitely would pony up for the burlier fork though, especially if you don´t upgrade all the time and are not a hobbit.
The fork is almost as important as the frame for the overall feel of the bike.
A good full suspension 29er can get scary fast in rough terrain. Better not "underfork" it.
If you already owned a Revelation the cost/performance ratio might not be worth it. But if you go all in…
I´ll pluck the Revelation from my Stumpjumper frame and build a Kona Honzo or something like it as a singlespeeder. Reduce travel to 120mmm and it probably will serve me well for a couple of years.
My "dream AM 29er build" will then get a Pike or 34.