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I have used Astronomik, Baader and Astrodon (current).
Astrodon are the best I have used.
Astronomik are very thin at 1mm and some filter wheels won't take them without a packer (extra cost). I don't recommend them because of that. I haven't quite forgiven Gerd for selling me a set without spacers knowing full well I would need them. He then came out with the spacers and wanted extra dollars for them.
Baader are not bad but blue and green could be separated more and they are not parfocal despite claims they are.
Astrodons are expensive but they are parfocal on my scopes and I usually use the luminance filter to focus and keep it at that for all the filters.
3nm filters though cost a fortune.
No experience with the other filter manufacturers you mention.
Greg.
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