Looking at a Thinkpad 16" P1 Gen 8 with 2X 1TB SSD, 64GB RAM, QHD+ screen, centered keyboard like MBP (i.e. no numpad), integrated Intel GPU, lightweight (4 lbs) for a little under $2.5K USD.

Closest I've found to an MBP 16" replacement.

Have been running Dell Precision laptops for many years on Linux, not sure about Lenovo build quality and battery life, but hoping it will be decent enough.

Would run Asahi if it supported M4 but looks it's a long ways away...