Harbeth P3ESR Anniversary edition. Worth the Upgrade?

I have not compared the two models but I do have the P3esr 40th anniversary pair. I use them in a second system. They sound much bigger than they are. When I first got them I put them on a 24" pair of two column metal stands that I already had. Sounded great. Later I bought a pair of the Tontrager stands. They are very well constructed and finished. The sound opened up became more musical. I know that may seem nebulous and subjective but that is the best way I can describe it.

I set my P3esr 40th up in my main system (temporarily set aside SHL 5+ 40th). I dialed in my REL Strata III at around 80 hz as did Yogiboy. Sounded great. The P3 was easier to integrate with the sub than the SHL 5+.