Thank you for the advice.
The only android box with a good build quality compatible with libreelec looks like the minix neo u1, but you have to settle for the s905, the 905x cpu box I did not find a good quality box that distinguishes it from other devices like me you've confirmed the Beelink MXIII II is probably the most recommended one. I also thought I would take the MECOOL KI PRO TV.
I currently found these android boxes :
wetek play2 (cpu: s905)
wetek hub (cpu: s905h)
minix neo u1 (cpu: s905)
MECOOL KI PRO TV (new CPU: s905d, Android 7.1)
MECOOL M8S Pro + (cpu: s905x, Android 7.1 not supported wifi on libreelec)
Beelink MXIII II (s905x)
M96X Pro 4k (cpu: s905x Android 7.1.1)
M96X VBOX (cpu: s905x Android 7.1)
MEMO UFO MEMOHI (cpu: 905x)
ZIDOO A5S (cpu: S905X)
Bundle M9S Z8 (cpu: s905x)
NEXBOX A95X (cpu: S905X)
Qbox (cpu: S905X)