Ive been doing a bit a researching on Meridian pre-pro's and there seem to be sooo many versions 568.1, 568.2, 568.5 ?, 568.2mm etc. and then there is the new G series and the older 561 series.. Can somebody give me a rundown of these pre-pros and maybe what they are missing and any other important information that may be usefull. Do they all have eq's ? Do any have analog bypass? Do they all upsample ? Are they all 7.1 ? What formats do they have ? Lastly, If you were in the used market, which model/version would be the one to get ? Sorry for the questions, But I do apreciate it as there seems to be a lack of information on htf about Meridian.