FWIW this is what they told me:
Personally, where there are clear technical benefits to one approach over another (LPS design, switch design, grounding design) I would trust the Taiko team 100%. The noise measurements are really objective and hard to argue with, for example. I have every upgrade possible with Taiko, and am waiting on the router and power distributor.
Where cables are concerned, however, I've always found that there's an element of subjectivity. Of course, the cable has to work in the first place (ie this isn't a 'locked' DAC cable as discussed earlier). Besides, I find that Taiko has seldom given clear guidelines on what cables to use either, and when they have it's been with clear caveats (eg. Intona for ultimate neutrality as a voicing tool, which is exactly what I wanted too so I bought it, in the recommended 1.5m length). Also voicing options in the power distributor and in XDMS. Heck, even with the USB drivers.
And with QSA there's a return policy so I was happy to try it for myself. I'm a card-carrying audiophile, after all
PS A bit of background, I have 4 different preamps, 4 power amps, and an integrated amp on top. I also have 3 different dacs. What can I say, I like variety- many options. Voicing doesn't matter to me too much when I look to upgrade, I'd rather get the maximum resolution and realism (and not 'fake detail'), and then I start tweaking with footers, cables, grounding, etc to get the voicing I want. I've found this always gives me an upgrade in the end. For example, they're a popular choice on this site, I know, but I just replaced all my Centerstage 2 footers (I have 12 1" and 8 0.8" CMS Centerstage 2 footers) with the much cheaper finite elementes because they work better for my system's voicing. Not planning to sell my CMS CS2 yet- I don't think they're inferior, they just do the job differently.
In this case, I put QSA under the 'upgrade' category, not voicing. You may have to revoice after.