depends on how low you want


the down side to the Pro s is while yes it has a threaded shock to get as low as you want with room to spare, it dosnt do anything to keep the shock from bottoming out, where as the function form's you not only adjust the height but you can keep the preload on the shock, so you wont bottom out.

I have a few friends with the pro S that like them, and ive had the F&F and i loved them, IMO it just depends if you want a good daily set up, or more of an adjustible set up