Definitive Technology, used, for one (among many).
"I have read that it is not such a bad thing to use speaker wire from amp to sub to monitors, and better subwoofer integration is possible."
This work fine. You can instead (if this is easier, and it usually is) connect from to the speaker wire from your speaker post to your sub "speaker level" and use the settings on the sub to blend with your main speakers. This is how I do it with great results.
"I have read that it is not such a bad thing to use speaker wire from amp to sub to monitors, and better subwoofer integration is possible."
This work fine. You can instead (if this is easier, and it usually is) connect from to the speaker wire from your speaker post to your sub "speaker level" and use the settings on the sub to blend with your main speakers. This is how I do it with great results.