The 300B may have trouble driving the Harbeths...its something to look into if you want to keep using that amp. Maybe some people that own that speaker can comment on that.
I have experience with some other Harbeth models and have owned Merlin VSMs. The Merlins are every bit transparent and revealing as people hype them up to be. They are capable of reproducing the human voice extremely accurately. Although, if you want musicality, the Harbeths will sound better to your ear if that is what you are searching for. The Harbeth sound is a perfect match between resolution and musicality where else the Merlin just gives you a boat load of resolution and transparency...if your amps are good enough that is. For your description, I would recommend the Harbeth hands down. Just my two cents.
I have experience with some other Harbeth models and have owned Merlin VSMs. The Merlins are every bit transparent and revealing as people hype them up to be. They are capable of reproducing the human voice extremely accurately. Although, if you want musicality, the Harbeths will sound better to your ear if that is what you are searching for. The Harbeth sound is a perfect match between resolution and musicality where else the Merlin just gives you a boat load of resolution and transparency...if your amps are good enough that is. For your description, I would recommend the Harbeth hands down. Just my two cents.