I respond because the Nad 165BEE is on my shortlist. It has a better than typical phono section with selectable sensitivity for MM or MC. Plus it has Class A circuitry and any reviews I've read have great things to say.
I also asked a dealer(who carries both) which he'd recommend, the Parasound 2100 or the Nad C 165BEE, and he said the Nad. It has a rich/warmer sound than the Parasound, which would possibly blend better with your Onkyo(like your Marantz).
They are not exactly cheap, but you should be able to get a 30 trial online. And the Marantz is probably worth a couple hundred, believe it or not.
I also asked a dealer(who carries both) which he'd recommend, the Parasound 2100 or the Nad C 165BEE, and he said the Nad. It has a rich/warmer sound than the Parasound, which would possibly blend better with your Onkyo(like your Marantz).
They are not exactly cheap, but you should be able to get a 30 trial online. And the Marantz is probably worth a couple hundred, believe it or not.