Buy the Plinius - Not only will it sound better than the Gamut, the company has a stronger presence and existance in the market - which usually has a direct correlation to quality of customer service.
By the Way - I use a CJ Sonographe 400 with Dynaudio S1.4 with a Supratek Syrah and Jolida CDP, RegaP25 TT, Denon 103. The sonographe400 is a similar amp to yours (might be a little bigger) - I'm actually not quite sure if either are "better" than the other... Neither myself, nor anyone who'se ever heard my system felt it was lacking warmth - warm recordings really come off as warm recordings... Though the Supratek preamp really is something unique...
By the Way - I use a CJ Sonographe 400 with Dynaudio S1.4 with a Supratek Syrah and Jolida CDP, RegaP25 TT, Denon 103. The sonographe400 is a similar amp to yours (might be a little bigger) - I'm actually not quite sure if either are "better" than the other... Neither myself, nor anyone who'se ever heard my system felt it was lacking warmth - warm recordings really come off as warm recordings... Though the Supratek preamp really is something unique...