If I'm you, I will add a pair of silver interconnect(Kimber KCAG) between the preamp/power amp to give the overall presentation a bit more transparent and detailed. Stay with the Jadis preamp, it is a very excellent preamp. It takes a lot of time to make the whole system sounds right. Switching preamp is not a very good method. As your music listening experience became more mature, you will find that the original Jadis's sound is the sound that you like the most..........
Tale of the preamps
I ahave recently been bitten by desire to add greater detail to my system. I believe the musicality offered via Jadis JP80MC pre may be limiting frequency extremes and inner detail. I own CAT amps and Eidelon...I believe neither of these components are lacking in bottom extension nor well defined presentation. I have owned the Jadis for 5 years or so, with no desire to surrender the music for hi-fi. But....a friends system, Eidelons/Atmasphere MA1s/Wadia exposed an inner detail which gave birth to a new itch. The CAT ultimate has been strongly suggested, but some comments allude to a cerebral rather than visceral interpretation. Any suggestions, especially from those who may have heard the Jadis are appreciated. The world of give and take.