In my opinion you are spending a lot of extra money pairing a floor standing speaker with subs. I would let your subs do the heavy lifting. You do not need a main speaker that cycles low when you are using subs. If you run your mains full range you are not getting full value from your subs, if you cross over at a higher frequency then you are paying for a portion of the floor standers that you are not using. You can get excellent results pairing subs with bookshelf speakers. I use the Wilson Tune Tots with my subs and in my opinion my system can handle any style of music from the heaviest bass laden EDM and metal to the softest folk and acoustic jazz, though I have to add with one caveat, I rarely listen to anything louder than 110db at the listening position.
I also agree with everyone that is recommending an external crossover unit be it analog or DSP. You have several options. Besides those already mentioned there is miniDSP, DBX makes both analog and DSP units, I believe Bryston has an offering, there is my favorite, the DP series of Audiocore units by XTA and I’m sure there are others that I’m not familiar with.