Starting a second system, need efficient speaker suggestions.

"Your Subs Manual does NOT specificity mention line in/filter remove low bass/line out without low bass to the preamp or integrated amp. AMP to speakers AFTER sub"

No they don't and I would never run my signal through a sub crossover. Anyway that's usually a feature on cheap mass market subs. If I did anything in that direction it would be a proper outboard crossover of good quality. 

Yes, I understand the concept of removing bass from the main speakers very well. 

OP:  what are your current speakers, and how is your Cary integrated doing with them?

I would search in a page like: 

"OP:  what are your current speakers, and how is your Cary integrated doing with them?"

I don't have the Cary yet, maybe Monday. Current speakers are Magnepan 3.7i with a Hegel H390 integrated. 

I'd like to try the other side of the audio coin, tubes and higher sensitivity speakers.

I'll try the Cary, but I'm afraid it won't be up to the task.

Cary SLI80HS paired with Volti Razz at home for me. Awesome combination in my book. When I picked up my Razz from Greg at Volti he threw his Cary on my Razz as well as a pair of Rival and his new Vittora prototype. IT was a pretty fun experience. Plenty of power for all three pairings. (of course they are all high sensitivity). Open, sweet, musical and gobs of dynamics. IMO really hard to go wrong.

Also agree with @elliottbnewcombjr ultralinear is the way to go. I switched back and forth for the first couple of days. I just leave it now.