Preamp or DAC

I have a similar type of system. Coda #8 amp, Holo Audio May KTE DAC, Holo Audio Serene KTE preamp and Aurender N200. I also have dual REL subs. I ordered a new BAT VK-80 tube preamp a few days ago. I’m also trying to integrate some tubes into my system. Many people I know weren't really happy with the Coda 07X preamp. You won't have any problems with impedance matching with the Coda and most preamps. The 10-1 ratio will be easily met with most preamps and your amp.

@backdoor

With your $12k - 15k budget, get a used Aries Cerat Incito S preampfifier or Helene DAC. Either unit will greatly transform your system and it’s worth every penny. It’s just extremely hard to find a used / demo unit in the market.

Sell the preamp and DAC and upgrade to a top end DAC with preamp capabilities.  I'd recommend the Weiss Helios.  GL!!

I have a CODA #16 and owned a CODA 07x preamp. I ended up with the Benchmark HPA4 (or LA4) preamp and the Holo Audio Serene preamp. Either preamp works great with the #16, with slight sonic differences. My DAC is the Schitt Yggi+ OG.

I recently heard the new SimAudio 791 preamp/DAC/ethernet streamer and while very good and extremely convenient. I had no desire to change out my preamp or DAC (and fibre optic streaming) for the much costlier 791. 

What are some of the shortcomings of the Coda 07 preamp?

I have the CSiB integrated in my system now and am just curious since the CSiB is essentially a combo of 07 preamp and 0.8 amp