Kaleb, your running no sway bar right? was the XM you tried with the sway bar still as bad on the trail? I remember you saying it made a huge difference in off trail for sure, but forget about on trail.
The one I rode with a swaybar I didn't ride on trail, but Jeremy (jermbob) says his is pretty bad on trail as well & he was connected until he rode mine a little bit. This is coming from a 12 doo for him, coming from an M series for me. After he disconnected he did say it was much worse.
For around here, I think the quick disco would be a good investment if you care about the trail, but It's not as if we're racing, and Jeremy & I end up waiting for other folks anyhow, so it must not be that bad. Still, if I honestly spent 50% of my time CARING about trail performance, I don't think I'd get a T motion.
Of course, you could get the T-mo, and if you don't like it, someone WILL buy it to swap out their mountain sled.