Have been using X10SRH and X11SPH-NCTPF motherboards for a couple years in servers. Theres been some learned idiosyncrasies over this time that might benefit others to stumble upon.
A temporary stop in the constant search to find an ideal platform. It's been a couple years since examining workstation offerings, catching up to the current generation.
If you've got an intel system and want to have your powertop tunables selectively stick then you can't rely on the auto-tune feature. If you do, you'll notice some subsystems are not available right when you want them (e.g. a mouse). It's better to profile and selectively apply the configurations that make sense for your use.
It has been a personal desire to have mobile broadband connectivity with a laptop and not have a requirement for peripherals like MiFi or Tethering, for half a decade. When it became possible to get LTE modems in newer model Thinkpads it was time to see if Fi had made data-only SIMs that would work nationally/internationally.
Trying to find a modern laptop that works well with Linux is quite difficult. I've been on a journey with difference manufactures ranging from Panasonic, Dell, HP, Lenovo... It's quite a mess. Thankfully the T4x0s line of laptops form Lenovo have proved to work well (generally) for the last couple generations. Herein is a discussion of selection criteria and some anecdotes for getting things to run smoothly.