Denon or Yamaha vs Other CD Transports

Wanted to get opinions on the Denon DCD 1600NE and Yamaha CD-S1000 versus other higher end transports.
These 2 units are roughly around the same price (on Yamaha’s website they show a price drop from $1800 to $1300).
I like the fact that they support SACD.
I have been seeing much feedback on the Jay’s Audio CDT-MK2 Tranport and also the Nuprime, which are pricier.
But I wonder if they are that much better? They do not do SACD but I suppose that would be as I do not have that many SACD’s anyway. They do support I2S connection but my current DAC does not support that but perhaps in the future I upgrade that too.
Currently I am using a Denon DBP-1600 (universal blu ray player) as a CD Transport.

I am sure the Denon and Yamaha would be a big improvement over the blu ray player but I am assuming the Jay Audio would be a huge improvement.
One more question, my current DAC is the Questyle CMA400i.
If I were to get the Jay' Audio Transport, would it be beneficial to go through my dac or straight from the transport to the IA.
Thanks