So I’ve had the Harbeths for a week now and have 15-20 hours on them. No regrets! They are about a foot from the back wall, so could I get a larger sound stage if they were farther out? Probably (certainly?). But they have nothing to apologize for. They are definitely keepers! They are on Skylan stands, powered by Lux MB3045 tube amps and an ARC SP-14 pre.
I also want to give a shout-out to the KLH Model 5s they replaced. The Harbeth may be better, but the Models 5s hold their own and have nothing apologize for, especially at less than 1/3 the price. Both are great speakers, IMHO! All in all, I am very happy I decided to pull the trigger on them. Thanks to everyone who weighed in with useful suggestions whether I followed it or not.