Congrats on choosing a middle! While I agree with you that [name_f]Jaycie[/name_f] sounds better with the “c” sound as apposed to the “z” sound, don’t feel like you have to settle because you chose the middle. You have a couple months. One pronunciation will win out. It would be a good compromise to let him choose the pronunciation, but both of you should love the name 100%.
[name_f]Jaycie[/name_f] [name_f]Joy[/name_f] is pretty cute!
I would really be hesitant to go with Jaisey. It will sound like [name_u]Jay[/name_u]-Z, who is amazing of course by ut not a great name for a girl imo.
You have tons of time to decide on a name you both feel wonderful about. I would try and resist the urge to rush to finalize the name until you’re both pretty satisfied with it.