I have the Matrix Audio MP-1 Pre-Amp with a pair of T+A M200 Monoblocks powering Diptyque DP140 MKII panels.
I would recommend for Interconnects, Ricable - both for digital (AES 110 Ω terminated) and analog.
But also have Moon Audio Black Dragon 75 Ω BNC-terminated cables between a Mutec MC3+ USB DDC and T+A DAC200, and another between an Aurender N30SA Clock input and a Mutec Nano MasterClock.
Nothing beats great cabling. There may be some "snakeoil" out there, but coming to forums such as these allows real-life recommendations to influence purchase decisions.
Some of the other stuff mentioned here are fantastic - so you have a wide range of choice. I only added mine since we both use Matrix Audio products in our chain.

