Ah, remember all of those well with the exception of the Corvus. I didn't jump on the HD wagon until the Davong which I recall was about 5Mb and about $5k.
And I just recalled a fond memory not only of serial printers in general but also the giant enclosures used for the Spinwriter in an office setting. Those were extremely LOUD suckers to be sure.
Yeah they screamed at 55 cps. You could replenish whole reefs with them now.