From L, to MX, to M. the OP has the good sense to inquire. IMHO the step from L to MX is a small one. the next step from either L or MX to M series utility tractor is a big one. Jeff & sea2summit explained that well in above posts My experience has been the same. The MX series has always struck me (from ownership of both) to be a wannabe M series tractor. The OP should carefully explore the reasons from stepping up from current L series for current & future needs. Any upgrade shoud be to solve a specific need. the future need forecast sometimes gets complex
personally, i'd never consider going back to MX with my current tractor, but each owner has their own needs. & more importantly, their wallet... best regards