Speakers, new and old alike, are solely a matter of personal preference and a dealer that recommends replacing a customer's cherished speakers just because they are "old" should be treated with some suspicion - maybe seeking that customer's wallet as his primary goal?
Changing speakers often drives changes in accompanying gear to better accommodate their different sound character/needs. Be aware of that if you are happy with your current speakers and gear as it reads like you are.
I have HPM100s (smaller brother to your HPM150s) in my vintage system and find them to be excellent with rock and blues, at both low and high volume. What type of music do you primarily listen to?
Dave
Changing speakers often drives changes in accompanying gear to better accommodate their different sound character/needs. Be aware of that if you are happy with your current speakers and gear as it reads like you are.
I have HPM100s (smaller brother to your HPM150s) in my vintage system and find them to be excellent with rock and blues, at both low and high volume. What type of music do you primarily listen to?
Dave