Thanks again to all.
I am reading and puzzling and hopefully not blundering. Too much.
News: I took the plunge and ordered a set of APT-200s.
If they don't do the job, they can go back. (I realized the k-77s are not adequate.) I hope to try it all out next week. Kind of exciting.
Wishing for a RTA and oscilloscope.
Meanwhile, Rod's speakers are (were) awesome. Are those double 12" like my 9844s, or 15" woofers? They seem to be placed right on the floor, or nearly -- at least for the ad. That should help the bass. I will try that at some point.
Enjoy the rest of the weekend.