2-channel Compressor/Limiter with Analog and Digital I/O
You can keep most of that money in your pocket. It's not a "High End" answer but used by many "Highender's" for this duty. A used Aphex Expressor or Compellor. Plenty of threads here on these for your research.
...although that is very minor. You said your chain is: "My voice NT-1 pop guard,blanket cage, preamp Aphex tubescence, compressor Aphex Compellor, 6i6, 48k. Should be completely transformerless into the 6i6 line in 3 and 4." I'd start by going mic to 6i6, with no plugins, eq, etc active in your DAW – and see how...
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