I did some investigation into this the other day. The short answer seems to be that if you like MacBooks, you aren't willing to accept a downgrade along any axis, and you really want to use Linux, your best bet today is an M2 machine. But you'll still be sacrificing a few hours of battery life, Touch ID support (likely unfixable), and a handful of hardware support edge cases. Apple made M3s and M4s harder to support, so Linux is still playing catch-up on getting those usable.

Beyond that, Lunar Lake chips are evidently really really good. The Dell XPS line in particular shows a lot of promise for becoming a strict upgrade or sidegrade to the M2 line within a few years, assuming the haptic touchpad works as well as claimed. In the meantime, I'm sure the XPS is still great if you can live with some compromises, and it even has official Linux support.