The 16" M1 Pro base and 32 gb ram models has the best battery up to 16 hours.

The 16" has a slightly easier to reach keyboard and better speakers compared to the 14" m1 pro.

The 16" M1 Max has the best gaming performance. Video editing and music production is similar across pro and max configs.

The 14" weighs less and has a smaller 3K resolution.

Not sure what to buy considering this device has to last 8 years like my late 2013 mbp. Leaning towards m1 max with 64 gb ram, 8 tb storage, and the 32 core gpu.

Apple basically bundled everything together so the only thing easier to replace is the battery.