Did not use it for the finals, though did try one for the full system. Generated some noise, so you do have less sensitivity compared to the normal QRN. If only used on the finals, may not be an issue.
Since there are 30+ amp switching supplies for other rigs, I would think that if you found the right unit the noise would not be significant. It is just that the units that I tried did generate noise. Might also be able to filter out the noise with active or passive filters.
My 2 cents