I've been using FreeBSd since 4.x. I'm assuming your referring to video drivers and the xwindowing system which is non operating system specific. I should remind you that this is a subsystem (or extension) and should be viewed from the point of a view as power users (and engineers) already know where to find out about chipsets, their relabeling, and of course the ability to set up their configuration intelligently. More importantly a recommendation like this shouldn't be considered unless you've spent significant time building and customizing your OS and graphical layer.