Here is a list of devices recommended by the community: https://forum.qubes-os.org/t/community-recommended-computers....
Qubes doesn't preinstall any spyware. It provides privacy with Whonix: https://www.qubes-os.org/faq/#how-does-qubes-os-provide-priv.... If your BIOS is compromised, then it might be game over; coreboot is recommended.