I am glad I reread this before I responded. By "XLR->TRS" you are referring to an "impedance matcher" I am assuming, which is terrible to use except under extreme instances. I actually have one of those lying around here somewhere and forget the specs on it, but it's something to throw into a drawer and forget you own TBH.
Quick answer - Run XLR->XLR (or TRS->TRS). Same cable (balanced/shielded) with different tips basically.
Balanced means that a mono signal is running down what is essentially a stereo cable (same signal both paths), which makes them less susceptible to noise and you can run longer runs of them without issues. This is why microphones use them, and also why you never see a recommendation to use a 3' XLR cable.
XLR has an advantage over TRS in that you can SEE the connector, and know it is balanced inside the box. A TRS jack looks identical to a TS (tip-sleeve) which is unbalanced, so unless you know (read the manual) that the jack is a TRS, you may in fact have an unbalanced run going on (a TRS connects fine to a TS jack, but only one path is connected losing its noise reduction purpose, i.e. no longer balanced).
Bottom line, for signal routing you always want to run balanced cabling and XLR is the most common (especially for your case).