I have owned the Io, the Io Sig and the Manley but not all in the same system. I currently have the Manley with the Io Sig coming in a week so I may be able to shed more light in a little while.
FOR MY TASTES (and the tastes of two friends who have nice systems and what I think are good ears) the Manley was better than the Groove in the system I heard them compared in. Bigger sound, fuller, richer midrange (not mushy), greater bass impact and better dynamics (Groove owners, I only heard it in one system so take that for what it's worth)
I am very happy with the Manley, but really liked my Io Signature when I had it (I sold Io at the time because I had eliminated my line stage and needed a phono stage with a volume control - now I have a line stage again and my system is finally settled in all the other areas) - so I just want the opportunity to compare them in the same system.
I noticed your system doesn't list a turntable. What table/arm/and cartridge are you intending to use?
FOR MY TASTES (and the tastes of two friends who have nice systems and what I think are good ears) the Manley was better than the Groove in the system I heard them compared in. Bigger sound, fuller, richer midrange (not mushy), greater bass impact and better dynamics (Groove owners, I only heard it in one system so take that for what it's worth)
I am very happy with the Manley, but really liked my Io Signature when I had it (I sold Io at the time because I had eliminated my line stage and needed a phono stage with a volume control - now I have a line stage again and my system is finally settled in all the other areas) - so I just want the opportunity to compare them in the same system.
I noticed your system doesn't list a turntable. What table/arm/and cartridge are you intending to use?