running full range or not full range...huh?

I'm assuming you mean with just the floorstanders, no additional sub in the picture.

Personally, I would rely on the speakers to determine what to do with whatever clean music signal is provided to it.

I would also do everything possible to make sure the speaker is integrating into the room as best possible for listening at the primary listening location.

If non of that works to satisfaction, then it is time to find a different pair of speakers that will integrateinto the listening environment better.

I do not believe in trying to fit a square peg in a round hole. You might pull it off but usually only with greater pain and cost. If you find yourself spending a lot of time doing that, then you either need a different peg, hole, or both.

I hi-pass my mains (large monitors with integrated stands, making them appear as floorstanders) with 85Hz in-line passive filters which cleaned them up tremendously. And have stereo subs doing the LF work. Clean, full sound.

pretty simple

if you want to play difficult program loudly and your
mains are not up to it then filter

if not just add sub to bottom

It depends. Don't listen to anyone who says that it's always better one way or the other. You have to try it both ways on your system in your room and give each way PLENTY of time for hundreds of minor adjustments. - Jim

Rockadanny -- Do you put the passive filter between the amp and speakers, or between the preamp and amp ??