My first solid state amp was a glite with dps long ago, never heard an m3. I think it is the glite was the most sterile thing I have ever heard, it wasn't dark or bright, it wasn't slow or fast...just plain boring and clean. It taught me that maybe "extreme transparency" wasn't what I really wanted and I have little reason to doubt that the gs-1 or even the gsx sounds much different.
You were probably just hearing what the source sounded like. Other amps will colour a lifeless source to make it sound better, but they also won't scale as much as a truly transparent amp. Pick your poison.
As for the GS-1/GS-X...reserve judgement until you hear them side by side with the Glite.
I just searched and found some comparisons by owners of both...matches my experience:
Edited by Shahrose - 4/21/11 at 6:39pm