@kevn -
You ask some good questions, and sorry if I've gotten prickly of late, have no patience for being policed by readers who are upset every thread on A'gon is not for them, straw-men arguments or having my integrity impugned without merit.
So, yes, I stand by my original statements: 1) Not every system needs a subwoofer. 2) Treat your room a little first.
However, I also think I mucked up my last move. Meaning, I think my 2-way speakers sounded a lot better in a previous home than this one. I did measure and got some useful but not excellent measurements all the way down to 20 Hz., Also, my new HT / 2- channel combo was far too complicated so I ended up with the subwoofer on the HT only.
My experience is that I've heard several systems by audiophiles with subwoofers, without glorious bass. Some had glorious bass, some had adequate bass, and some had terrible bass. It's hard work.
One of the best examples of this is Fritz speakers in a hotel room. He uses moderate sized 2-way speakers and travels with 6-8 acoustic panels and that's literally all he needs in those rooms.
Now, let's revisit your question:
might you now reconsider complementing your listening with a carefully integrated subwoofer set-up?
In my specific case right now, no. Should you? Sure, so long as you are prepared to do the work.
Now, why not for me? Because I went from a 2-way, passive design with 1x 6.5" woofers to 3-way active system with dual 10" woofers. So, one way to look at this is that I added 4x 10" subwoofers with a high crossover point (250Hz), 2x 250W amps and DSP capabilities. Dual 10" woofers have nearly the same surface area as a 14" or 15" per side.
Sitting to the side I have a Hsu Subwoofer with an actual 15" subwoofer. My HT receiver is configured ot use it for low frequency effects (LFE) and the bass for the center and surround channels. If I tried now to "add" bass by setting a high pass filter and routing bass to the sub I'd actually be diluting the bass capabilities.

