I’ve kept using ProRes even on Windows, as it has worked so well with BlackMagic’s Infinity Pro (never tried DNxHD, perhaps it works as well). In case someone’s wondering how to encode ProRes on Windows, I’d suggest ffmpeg. No need for advanced options, just something like ffmpeg -i inputfile.mov -s 1920x1080 -vcodec prores -acodec libmp3lame -aq 3 outputfile.mov works for me.