What should I upgrade to?

Currently I have a Savannah SGOsixteenCE acoustic which has been good for the past twelve months that I've been learning, but it's christmas and I want to upgrade. I like to play various sounds such as One Last Breath by Creed, Maine by Noah Kahan, or Jack Johnson.

I hear the Yamaha FS eight hundred is an amazing acoustic to own, but I'm not sure if that would feel like much of an upgrade or if I should upgrade even more to an acoustic in the four to six hundred dollar range.

What are your suggestions or thoughts?