For some additional details, it'd mainly be used for lighter resource tasks like writing documents, maybe dabbling with some coding, not necessarily aimed at any high end gaming, or heavy video editing. For this reason I'd really dig the keyboard having a num-pad, and while I didn't think I'd have to look for this on laptops of all things...I'd like it to have a headphone jack.

Ideally I'd be able to pop a Linux distro on it for longevity's sake, and longshot maybe be able to open it up to upgrade RAM/storage (not a dealbreaker if not though).

I've found some okay looking laptops in a light search so far, but I'm curious about others' recommendations here (as well as any warnings on which to avoid).