Cables for AR REF3, VT100 MKIII and Ruark Equinox

I would like some advice about the appropriate balanced cable between my preamp Audio Research Reference 3 and VT100 MKIII amplifier, and also about the speaker cable for the Ruark Equinox.
Now I am using MIT Magnum M1 balanced and Magnum M1 speaker cable, though it is very detailed and tridimensional I feel the combination a bit on the bright side with a lack of warm. I am thinking to move to the Transparent Ultra MM series, but I don't know what I lost from the MIT Magnum M1 sound.
Please, some advice?
Thanks in advance.