You should consider purchasing a device from a manufacturer who makes an effort to support Linux on their device. The two big ones at the moment seem to be Puri

You should consider purchasing a device from a manufacturer who makes an effort to support Linux on their device. The two big ones at the moment seem to be Purism and System76. Dell also does, but, IIRC, you have to use their bastardized ubuntu kernel crap on their newer systems, at least until proper support has been upstreamed to the kernel (if they can still be bothered to do that.)