Interested in what you find tonally inaccurate WRT the Stratos? I find mine to be perhaps slightly warm but really quite neutral. I have not listened to the SL amps however.
To the OP: the build quality of the Stratos is nothing short of amazing, particularly considering the price point. Heavy anodized aluminum case, face panel, etc. Internally they are built very well also. I'm curious as to what effect the Extreme and Glass Ceiling variants have on the Stratos. I've been thinking of talking to Klaus to see what upgrades would run me. Mine is a Stratos Plus (basic Stratos with the 120,000uf cap upgrade). Apparently there is a new higher-end Odyssey amp out, the Kismet. Check out audiocircle for the Odyssey forum for more info
Odyssey forum