Hi Mr. Tennis,
I have seen your posts and respect your passion for tubes (MV125 in particular). I owned CJ MV60 for 9 years and still own CJ pre.
I have never heard the Maggie 20.1s but have read it is a great speaker. The many Maggies I have heard have generally felt 'fuller' to my ear than the corresponding MLs. In the way an EL34 tube can feel fuller in that rich, lifelike way. I would bet the CLX could get there with some work (Descent sub), but standalone, I would suspect that the Maggie 20.1s are the fuller loudspeaker. Personally, I would be very happy with clx plus descent I bet longterm. standalone, not for me. I would def want to hear the 20.1s. Again note the caveat I have heard many maggie's, just not the 20.1. Good luck!