Better Amp for Cornwall IV's...

I have a 70wpc PrimaLuna EVO 400 tube integrated that I drive my Cornwall IVs with and it provides waaaaaaaaay more than enough power to push the speakers to deafening levels without breaking a sweat.  Given that, I'm sure the 70wpc Denon would also be a great choice for the Cornwalls.

You mentioned the DCD-1600NE.  I just received the Denon DCD-A110 SACD player and I'm so impressed with it that it has me thinking about buying the matching integrated (PMA-A110).  In other words, I think your experience with your SACD player will mirror the experience you'll have with the PMA-1600NE.  I wouldn't hesitate for a second to buy the Denon amp if the quality of Denon's other hi-fi gear is any indication what to expect.

@kfscoll,

since CW4 so high efficiency and PL are tube, do you get any noise issues through the speakers or is it dead quiet?

Of course, you'd be better off with the Denon PMA-A110 integrated, which is the 110th anniversary model, and they put some special effort into.

Likewise, of course, it costs more.
https://www.denon.com/en-us/product/amplifiers/pma-a110

I know how luscious tubes can sound, but give me good, clean, fast, noise free, reliable and consistent, class A ss, anytime ( and this is with horns ). Just my opinion, and just what I like. Nothing debatable, listen for yourself, and decide. I own ( still ) many different ss power amps, all biased in Class A ( at least for the 1st few watts ), and with my Lascalas, I am sure, even with my spls, I stay within class A operation. 

BTW, I switch out ( rotate ) amplifiers the way folks switch out tubes.