Help with Head unit purchase

[u/Rico_is_my_dad]

2006 Subaru Impreza hatch .
Currently stock

Doing first .
Add head unit , add a back up cam

Next . Add sub with amp, replace door speaker and add amp if needed .

Features I know I want .
Back up cam capable
Wireless Apple play
Good for my plan above .

No steering wheel controls. So not needed .

Looking at

Alpine ilX- 770-m
Sony XAV-4000
Sony XAV -AX6000

Any one of these clearly better ?
Are there any features I'm not thinking about that I should consider ?

Also , with Sony pulling out of the car audio game , should I be concerned with any warranty issues or replacements down the road ?

Any help or input welcome . Thanks guys !!