Are you stating that the 509X bettered the M10/C10 combo?
Any real experiences with a Luxman C900u and C10x?
I'm in the market for a new preamp and have the M10x and am leaning to the Luxman C900u or C10x. There aren't many dealers around me that have both for me to try and there doesn't seem to be much info on both online (i may not be looking in the right places )