I would play both if my machine wasn't the only thing I have and in such bad shape anymore.
Why? They have plots that aren't stifled, their renders in 3D are still pretty good for today's standards, it's one of the most well known games for modding and thus friendly to that end (with a top notch bunch in holowan), and an unforgettable cast of characters.
"I cant see S***! --YOU GO TO HELL!" --Tourettes guy