I don't quite understand. Going to have to think myself through this real quick.
OP has a really nice progressive press, has no issue switching from large to small primer and is very familiar with reloading.
The last time I ran 9mm on a Dillon 550, it was at 400 rounds per hour. I currently load in batches of 1000 on a Dillon 650 at just over an hour and load 5-8,000 rounds per month.
IMO, the biggest advantage is you get to build the exact load you want. I shoot a LOT of 9mm and there isn't anything on any shelf to buy that checks all the boxes for me so I load my own. And it's so very much cheaper than store bought.
The only thing that would make or break the choice is how much is your time worth? If it's worth more than the cost difference and you are happy with store bought, DON'T load your own. If you enjoy loading your own ammo and store bought isn't just right, DO load your own.
Just my $0.02 for your consideration