Older models are sturdy (IBM ones are very robust but are also too old), probably better with replacement parts availability.
Two-battery models, like X230-X270 models (and others) can have a lot of battery power put into them. Mine has 72Wh external + 24Wh internal, and I can hotswap the external one, so if I want to I can buy a second 72Wh battery to style on everyone else.
Generally good Linux support, but do look specifically how well whatever you are buying is supported.
edit: the models I mentioned don’t seem to have magnesium alloy chassis, so while they might look like a close range weapon, you probably shouldn’t use them that way.
You press it with a little bit of force (just to have the finger not slip away) and then move in some direction, the cursor will follow. Usability ranges from “fun gimmick” to “I have heavy gloves, the nipple is my only mouse input”