Both of my my bikes are rigid steel..Salsa Mukluk (fat bike) and Salsa Fargo. There's a huge difference in handling with rigid forks and suspension. There are times when I miss having a suspension fork. It is a harsher ride with a rigid, but I wouldn't change either bike out for anything. A fat bike has wider tires at 3.8 inches and run around 5-10psi so there is a suspension factor there, but it's not the same. Of course trying to get a 30+ pound fat bike and me up a hill usually ends up in disaster as my last trip ended up with me in a creek.
MTBR can get pretty quiet but post in the beginner forum or the 29er if no one is really helping. 29er forum can get pretty crazy and wild so don't let them run you over but they do know their stuff once they settle down.