Dear Slowhand: I'm not an owner but maybe what I posted on it could help you, at least is an opinion on the subject:
+++++ " Dear vac man: Very nice audio system you own and very nice review you made, congratulations for both!!!!, you are very good writer/reviewer.
I always try to put things on the " right " perspective ( for me and IMHO ) to understand it and to take benefit of/on it.
I own/owned and heard all the cartridges named here including your beloved SG and my experiences about were a little different from yours.
First I have to tell that as important is the matching in tonearm/MC-MM cartridge as important is the Phonolinepreamp ( maybe more critical that what we think ) where the cartridge signal must pass through.
I don't know which were/are the Phono stages-line ones that you use to heard your MC cartridges but I can see due to your comments about that no one made/make the right " honors " to those MC cartridges.
I can see too that you speak about tracking and refer to MC and MM cartridges as well the SG but I don't read anything about your MM cartridges that you own or owned. In reference to tracking I'm with some of the best MM cartridges over any other one ( unfortunately not today models. ) and you can read something about here: http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1200430667
I heard the SG ( I have to say that with oly 30 hours on use. ) in a very very nice top quality home audio system and my first impression was: WOW!!! but after hearing for some time and after comeback from the initial and nice " surprise " I just don't like what I'm hearing specially on the high frequencies and a little in the un-natural tonal balance of its performance, I'm a little sensitive on both frequency extremes and after a time my ears were " tired " of that SG sound ( maybe because that SG was almost new . ) that was not analog like or music live one it was more like a digital source: a good one digital source ( DVDA ).
Fortunately ( for me ) I asking to change to a normal MC cartridge ( in this case was the Lyra Olympos-Essential phonlinpreamp. ) and even than the Olympos was not perfectly matched to that Phonolinepreamp and that I don't know for sure if the Schroder tonearm was the best tonearm match for it suddenly the " lights " goes ON again: overall no contest.
Next day after heard the Olympos switched very brief to the SG and IMHO was a truly deception.
I always said that the RIAA eq deviation makes a great differences in a MC or MM quality performance and only when you hear cartridges in a phono stage with a RIAA eq deviation lower than 0.1db can you understand how important is that subject.
You have to take in count here that the RIAA eq. is a curve where any frequency deviation build colorations on almost three music octaves and this is IMHO what you was hearing in your MC cartridges through your past phono stages: high RIAA eq deviations, not the cartridge design.
IMHO the SG performance in its today status it can't even the very best MC/MM cartridges when these cartridges are in the right tonearm and with the right Phonolinepreamp, this means in even condition/circumstance than the SG matching set-up.
The SG sounds different? absolutely but IMHO and with all my respect to you and the designer: not better.
Anyway, a very learning and interesting review.
Regards and enjoy the music.
Raul. " +++++
IMHO I don't think that the SG ound match to weel with your Gallo speakers.
Regards and enjoy the music.
Raul.