Value of upgrading only 1 set of interconnects?


I currently have 2 sets of Cardas balanced cables. 1 set goes from DAC to Pre, the other goes Pre to amps. I’m considering upgrading the DAC output set to something like Teo Audio , Cerious ,or High Fidelity.

Should the 2 sets be of matching quality or can I expect a significant enough improvement with just 1 upgraded set?
128x128doitwithlife
@cleeds 

"Don't be silly. If that were true, the Internet wouldn't work."

Could you elaborate, please?
I'm going to go against what most people have stated here on the thread but. In my years of listening to systems and changing cables I have found the preamp to amp interconnect is the most important and most apt to changing the sound of a system when upgrading. Simple reason being that you're volume (or in this case the electrical power) is lower than the one the source components use normally. Usually about by half. Because we never listen to our systems at full volume. The source components almost always see full power during a song.

So to make a long story short reserve your best interconnect for the preamp to amp connection which usually needs a much lower noise floor and better resolution for those lower volume levels. 
OP: you didn't say WHY you feel the need to change cables. Please enlighten us.
I think you should hear a upgrade by only upgrading one pair of IC. How big of a difference depends on the upgrade cable and where in the chain you do it.