Mine have shopped, anxiously awaiting their arrival!
Meanwhile, I got my flex forks and got them put on yesterday. They're a pricier upgrade, but I think they'll be well worth it. My yard isn't exactly smooth and I could hardly take advantage of the increased max speed on the XDX over my old mower. With the flex forks, I put the levers all the way front and while it didn't take away all the bumps, it no longer seems like it's unreasonably hard on me or my mower.
In my short test yesterday, it also seemed like the flex forks also really help with what I call high centering. The frame on this mower is so stiff, if I run over a tree root or small ridge just wrong with a front tire, it makes the rear tire on that side lose traction.
I think I'm going to be very glad I made this upgrade, recommend anyone to try them if you have a rougher yard!