I still have my Fusion as a backup. I still throw it out every once in awhile just for kicks. I upgraded a few years back to the X2s which is great. Always had a little regret of not just going X24 tho. I don’t use any of the “extras” that the X2s touted at the time. That said, it’s been great so I don’t plan on upgrading until something becomes irreparable. It’s louder and clearer than the Fusion. Biggest improvement in my opinion is the battery life.
If I call more coyotes with the X2s it’s because the batteries didn’t deplete mid set! Not because the Fusion wasn’t as loud or as clear sounding. I think the whole sound quality hype is way overblown. Just my opinion.
Edit to actually answer the question!
I would personally stick with the X24 for my working man’s budget. If I had a few extra $$ and maybe seen the new TX2000 remote in action, I would go X48. The remote features MIGHT be the driving factor, not the sound for me.