Depends on your own use case but I’ve been using BlissOS (https://blissos.org/) on an old HP Elite X2. As Bliss is essentially just Android-x86, it’s fairly polished; only thing that I haven’t figured out is configuring the hardware volume buttons.

Have yet to add an Acebeam to my collection, this looks like a good one for sure!

Forza Horizon 1 was never released on anything else (although you can play with BC on newer Xboxes), playing through Xenia is mostly fine, some occasional bugs.

Convoy L7 definitely has the form factor but no Anduril.