As others mentioned, It its worth mocking up the system and getting it up/running even if you have to try some loaner library cables from TheCableCo. If you plan to keep the XP12 longer term, while the Cardas Cygnus is not end-game for some Pass amp owners, you could do a lot worse if you must buy cables now. With your current investment, I’d do loaners, and listen for a while. Get a first baseline. Those DA-C 60i speakers have the separate mid and soft dome tweeter, so results really depends on what kind of room your are putting this in, are there soft or hard floors, hard walls, furniture all around or no furniture, reflections?, etc.
Some sources/DACs can be a crapshoot, and can be totally overrated, too costly, imo. Do you have anyone near you to borrow, or buy on on 60-day return policy. What if the system sounds too bright or too soft. Likely more bright with that preamp/amp pairing, however those speakers will soften it some You need that first baseline test to start from - - to figure out where things are "at". Same others are recommending above, otherwise you can get stuck with some stuff you may not want to keep if you go big-bang-all-at-once. Or, unless you want to over spend a lot more $... Reno HiFi knows of the proven stuff and you’ll pay notably more for it.