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Spindle is made by Hiteco, a pretty. common supplier. They have air blast during tool change as well as constant lower volume air for keeping dust out the labyrinth seals. I know that a lot of those style units have adjustment for air flow as well, so you shouldn't have to have huge amounts of CFM. You can probably get by with a smaller compressor and an 80 gallon receiver... that way you have reserve for rapid/quick tool changes.

I've recommended the Eastman units and so far haven't heard any bad, although I did read some of those reviews that said they had issues. Might have been a bad batch of components during covid for all I know.

The scroll compressors are supposed to be good, and run a lot of hours before tips seals need to be replaced. I would not ever recommend a rotary vane.... maintenance nightmares and don't last long unless they are running at 80% plus of full capacity.

If I replace my old piston compressor, an I/R but it's not the slow speed pump.... I would go with a Champion, I like their integral head/cylinder design and they run so slow that the sounds isn't very bothersome. My son found two of them and has set them up in tandem for emergency purposes in case one goes down. He's running 3 CNC machines and numerous air tools for deburring.