Well give Pocketbook by Obreey a try (I have no vested interests, BTW). It's free so you won't have to shell out again. I don't believe it takes copies of all your books. It doesn't have as much customisation as Moon+ but it does have plenty (some well hidden
) It also has TTS, progress-sync-via-Dropbox, configurable tap-zones and gestures and support for Adobe DRM (I think, but I've never tried it). It's really very nice. I've been using it quite a lot lately since Mantano got a bit glitchy.