KOR:
but I still feel very uncomfortable having 2 additional emi sources next to my logic electronics.
Why by worried? Logic chips output tons of EMI, they don't care about SMPSs one bit, just be
sure to thoroughly decouple logic chips. Every piece of digital electronics out there is awash with
PoL buck converters, sometimes a processor is literally surrounded by multiple buck converters
each generating a different voltage rail.
Analog circuitry is another matter, power rail noise will matter for many analog purposes, like
audio, or high precision ADCs and DACs. Here its common for all the analog rails to be generated
by linear regulators.