I am leaning towards pulling the trigger on a used set tomorrow, there is no dealer within a reasonable distance.
good call... i think buying a used set in excellent condition at a fair price is the smart way to learn whether the shl5 is right for you
hearing it in your own system, for an extended period, playing with placement etc etc allows you to really appreciate any high performing speaker, and fully understand whether they will meet your expectations as an end game speaker
my only other add is that you might want to try a nice solid state amp in the 75-100 wpc range... many of us harbeth owners feel that refined solid state works best with the bigger harbeths to tighten down the bass response -- the speaker itself adds a lovely dose of midrange dimensionality and treble refinement -- these traits coupled with tube amps may be somewhat duplicative