I cant comment on the CT6 paired with SS. Mine is paired with tube amps. But the CT6 is very much a TUBE preamp albeit a little dry with the stock tubes. Try using vintage tubes which are a big improvement over the stock. Both Amperex and Siemans will give you what you appear to be looking for.
conrad johnson CT6 with solid state amp
Has anyone paired the CT6 with a solid state amp? How has this combo worked? Does the sound have a tube like richness? Any other comments on the CT6 would also be welcome.