I've been quite happy with fox RPL. Compared to RP23 (I have one of those also my bike came with), has everything RP23 has and more...a lockout. (I use it for my style of riding.)
After further review it seems imho, DT XR carbon failure rate or issues are quite high.
(You will here definitely by some users that there is no need for lockout on Mojo, usually when you hear something SO said, the user does not know what they are talking about and can't feel the difference in power output with different suspension setups.
But it is correct, there is no "need" for a lockout. But even some of the guys at Ibis hq have used them on their Mojs. That is where I got the idea to run the RPL.
It is a purely subjective matter such as when using one your seat sits a bit higher and might feel you get more leg extension for the longer smooth out of the saddle climbs.
For pure power, long riding guys they might really "like" a lockout.
That said, most of those people go for shorter travel race bikes as they are fitter and don't need all the extra suspension. But if you want a bike that can act like a short travel wonder bike but with the flick of a knob act like an all mountain bike with gobs of travel a lockout is very desirable and you should try the RPL. Also, push can tune the RP23 in this way and then the max propedal setting with rebound turned way down is very close to lockout with lots of blowoff threshold.