What size and model eReader would you recommend for reading things like O'Reily tech manuals? (Or comic books?)
I had some success with pocket book sized manga on my Kobo. I converted jpeg to cbr and then pdf. News paper style comic-strip type comics did not work out as well. I had issues with page breaks and proportions. But, maybe I just need more practice with Calibre.
Full sized comics were impossible. (I you are interested I used the PD comic site at
http://goldenagecomics.co.uk/ for getting test material.)