Why do you want to replace it? It does quite a bit fairly well including a completely flat signal capability.
What you would need would be a nav-tv to intercept the signal.
This doesn't list the 2019 (although as far as I know the 2019 f350 audio system is identical to the f150...but I could be wrong) but it should work. Might be worth a call to them.
https://navtv.com/products/NTV-KIT88...sp12a-a2b.html
As far as DSP, for $1100, you have quite a few options in that price range depending on what you want. Helix dsp.3 or pro mkii or minidsp 8x12 with DL would be my go to DSPs. If you haven't bought your amps yet, you could even go with nice integrated unit from Helix or JL vxi series.
This also comes down to, who is doing the install and who is going to tune? If you are not tuning, then whatever the install place feels comfortable with. There are quite a few good installers/tuners in California, not sure about your area but I am sure someone will chime in with who is in your area.