NAD is warm. I run Rowland 102 (same thing as S300) into Paradigm Studio/60 v2 (same tweeter as yours). Sound is on the bright side. I upgrated crossover to no avail (small improvement). Tweeter used by Paradigm in Studio/60 v2 is Vifa aluminum dome and costs $30. Berillum tweeters are amazing but expensive. Usher BE-718 (great reviews and inexpensive) has berillum Tweeter and, from what I heard, works great with Icepower (S300). My brother has NAD and Cabasse Caprera. Sound is very warm.