McIntosh 830

Is the Node 2i your DAC or the 8900? Either way, I think you are doing a disservice to the amps and preamp (yes, the C2700 would be better) by not getting a better DAC/Streamer.

What are your speakers? It seems like you spent a lot on amps and preamp. Your amp implies you definitely will get a much better sound with upgrading your streaming/DAC solution. 

I guess I'm just not sure how you're allocating budget with the 830 monoblocks. They're like $8k, right? If you are spending that much on amps, and $5k on speakers, spending like $2000 or so on a good DAC seems like a logical next step, unless you don't listening to digital music. There are so many great options. What do I have? I'm not sure why it matters, but my current list of DACs (in order of most used): dCS Rossini+Clock, dCS Bartok, Chord Hugo 2, RME ADI-2, Lynx Aurora (n), Mytek Manhattan 2, Mytek Brooklyn DAC+, Theta Casablanca V.