The Harbeth fit my musical preferences perfectly; I typically go through a lot of equipment, but I've had Harbeth in my system longer than any other component.
Your system looks great (and I am sure sounds great)
I love the overall simplicity of your system and those Harbeth WOW! I know they sound great and they even look better!!
I almost went with the P3ESR in my own system but finally went with the KEF LS50 (which are $1000 cheaper here in Canada). the LS50 sound quality is on par with the Habeth P3ESR but they can't compete on look!
I find the Harbeths sound best with a lot of power and the MF packs a 500 watt punch. I've used the SHL5+ with lower powered tube amps and didn't enjoy them nearly as much.
My next goals are to focus on clean power (dedicated power lines and upgraded outlets) and room treatments.