Welcome to the forum, limecello. It can be daunting trying to find data/info via thread search. You might want to try our WIKI
here. Hopefully it will be somewhat easier to glean the data you're looking for. Or see the matrix
here.
I've finally settled on the EZ Reader (Hanlin V3 family) with OpenInkPot firmware as my ideal. I have some problems with the way Amazon & Sony do business.