There's no reason at all that a floorstander couldn't be used with a subwoofer IF the subwoofer is well integrated and IF the subwoofer is restricted to reproducing the lowest frequencies (by setting the crossover low enough). In my opinion only the very largest floorstanders are truly "full range." For example, my Paradigm Studio 100 V3's benefitted tremendously from the Rel Storm 3 I was using. However, the crossover point was set at something like 28 hertz. With my current speakers, it's set even lower at 27 hertz. One caveat is that the sub has to be up to the task.