Discussions about cables very often ignite some kind of war, for and against and I think it´s because as rydenfan point out, synergy and system matters a lot ( every system is different) + you need a nice quality chain to really gain something from cables. If you have cheap 200 $ DAC and a Taurus, cables doesn´t matter that much IMO. Only 6 weeks ago I tested 4 USB cables on the Metrum Octave 2 DAC and on my Calyx DAC which cost almost double. Much less difference between Lindy USB 30 $, LAT USB 125$, Nordost Blue Heaven 400$ and Audioquest Diamond USB 1000$ on the Metrum Dac than on the Calyx and source was a fannless PC with the new Jplay Jcat USB card (remove lot of noise). So crazy cable investments can make sense if your gear is up to the task and you have a consistant chain with good source. I would say , if you buy both Taurus and Vega DAC you can tune the system a lot for the better with cables, both smoother with copper or more clear with silver. Also buy a better power cable than the 5 $ one that usually come with hifi components, they can be very noisy and bad quality. So the advice I would have give my self 5 years ago is : Try different cables out and buy second hand, so that you don´t lose much money if you have to sell them again.
I use a Audioquest Colombia XLR ( bought it used) between my Calyx and Harmony amp, neutral but still very smooth sounding cable. Will be interesting to hear how it works with Taurus. My plan is also to get a balanced cable to my HE-500 and I think another silverplated cable will do, as He-500 to me is a bit warm sounding. But it´s trail and error guys, the way to audio heaven is a long and winding road