Cable info

I use the Acoustic BBQ(16g Dueland wire) IC's made and sold by grannyring on this site with my Node 2.  Very pleased.

I would echo the suggestion of spending your money on a better external DAC than the one in the Node 2. 

I can't see the logic in spending a lot of money to replace the already good interconnects you have to try to improve the sound quality of a DAC included in a $500 piece of gear. 

Take what I said with a grain of salt as I don't know how good the sound quality of the RCA outputs is, I connected my Node 2 to my Auralic Vega immediately.  I'm very pleased with the sound quality in this configuration, but the Vega doesn't do MQA.  I am skeptical that MQA directly from the Node 2 would be better than what is coming out of the Vega.

I picked up one pair of the new Cardas Clear Cygnus RCA Interconnects to use in a different system I put together, used between my Allnic T-1500 300B Integrated amp and MBL CDP. I was shocked to hear how it bettered many interconnects that I find to be very good and have highly praised.
The Cardas Clear Reflection, Clear Interconnect, and Clear Beyond cost more and sound better at the usual pay a lot more and get a bit more improvement price.
Feel free to PM me if you have specific questions.

I did extensive a-b comparison between rca out and spdif out from my vault 2 using same nordost heimdal series interconnect.
There really was NO comparison in my system.
But you are looking at 2k for a Brooklyn so.......

Depends on your budget.
Node2 is only $500 so would not make sense to spend same again on RCA cables. The nordost heimdal are probably over 1k new and I doubt the node2 dac is any different to the vault2 DAC.
I know the Mytek liberty is about 1k new the Brooklyn about $2200 new so it all depends how far you want to go.