I may have some insight in this; First I ran a restored Sansui CA2000 for a couple years before I found a significant enough upgrade in a Mcintosh C2700 preamp. So no worries about using that preamp they are very good for the era.
I recently moved from a Mac system C2700 preamp - MC301 mono blocks to a Coda CSIB V1 which is basically a #8 and their top preamp in one chassis. I got the Coda as an interim amp while I save up and ordere a new Tube preamp-SS amp. I’m running magico A3’ for speakers.
I find the Coda is more detailed than the Mac’s were, similar bass and midrange but better top end. I would say the mac mono blocks had a little better sound staging but not enough to be an issue (probably the tubes in the preamp, NOS Mullards). The Coda has excellently detailed bass more then the mac’s, but not quite as deep as the mac’s very slight here. The Codas top end is not overly bright but very detailed. Midrange is excellent on both with the Coda being a little more detailed but not as euphoric (probably the tubes again).
The hi biased class A definitely gives you that Class A vibe. The V1 is the hi biased version so 18wpc at class A then 150 into 8ohms 300 into 4ohms etc. If I was going to do it again, I may have gone with the V2 little less class A 12wpc I believe but more power in A/B.
Finish quality of the Mac is slightly better then the Coda but this is opinion only as both are well made. Coda’s a little harder to keep clean with the brushed aluminum case work, splitting hairs here. Both are great at what they do but the Coda IMO is the more detailed of the two, better over all sound, the Mac’s more relaxed, more powerful sounding. Oh, The Coda hi biased class A doesn’t run that warm so no issue there. Currently selling my CODA integrated my preamp is in stock, Thoress Full function preamp :-) now the amp mmm not sure yet.
