I would think that that your Prima Luna HP amp would be VERY hard to beat. Is the new amp Class D? If it is, that could be your problem. I am like you, prefer tubes although In my case use an all tube pre with a solid state amp. From my experience, if I am not smitten with a new piece of gear upon first listen, nothing will make me like it and back it goes.
My friend has the Prima Luna HP Integrated with the KT150 tubes with Harbeth 40.2 speakers and the sound is rich and to die for. It is a very well balanced combination. Best of luck with the new amp.
My friend has the Prima Luna HP Integrated with the KT150 tubes with Harbeth 40.2 speakers and the sound is rich and to die for. It is a very well balanced combination. Best of luck with the new amp.