Do you have any kind of powder where you ski? If so, how much and do you already have skis dedicated for powder?
It kinda seems like you want us to say "just get FRs" to justify not getting Jmos, and honestly you can go either way. If you want to do a lot of switch-ups on rails and big spins on jumps, get FRs, if you're looking to do more surface swaps and presses and floaty slow spins on jumps get Jmos. However, if you do get some powder every now and then and don't have skis dedicated for them, you'll be really happy with the Jmos on those occasions.