[Rafaelo4]

Well I can only tell about my experience and testing via PSR-600.

I managed to convert (using Calibre) some 25GB of comics (CBR/CBZ) in about
9 GB of .lrf which PSR-600 is reading without problems.Sharpness,conrast,font size/clarity all beautifull.

I tested various commics:

From Italy:

Nathan Never, Martin Mystere (Marti Misterija), Zagor Te-Nay, Dylan Dog, Magicni Vetar, Tex Willer, Mister No, Dampyr, Ken Parker, Nick Raider (Nik Rajder), Komandant Mark, Brad Barron, Gordon Link, Leo Pulp, Ostali Bonelli junaci, Kapetan Miki, Veliki Blek, Dzudas, Lazarus Ledd, Kit Teler, Karabina Slim, Tim i Dasti, MET MERIOT,

From France and Belgium:

Gaston, Bernard Prins, Buddy Longway, Lik Orijan, Bluberi, Torgal, XIII, Talicni Tom, Aster Blistok, Ridjobradi gusar, Asterix, Rahan, Ramiro, Jeremiah, Hugo Pratt, Tin Tin, Spiro i Fantazije, Tangi i Laverdir, Komanca, Boa Mori, Umpah Pah, Bruno Brazil, Dzonatan Kartland, Largo Winch, Valerijan, Iznogud, Uranela, Bob Moran, Druna, Hombre, Jugurtha, Lester Kokni, Tigar Dzo, Sami, Mornar Nik i Crna Brada, Mek Koj, Dzeri Spring, Natasa

Some American comics: Mandrak,Conan,Tarsan,Ramiro......etc

I tested each of these on PRS-600 and it took me 2 weeks ^^ and Calibre did beautiful job with poorer scans.

I havent tried many Mangas but since they are usually in small format quality
should be good.

My 2 cents.