Preamp Advice/experiences needed

I recently auditioned a Vac Renaissance Mk 5 and it was damn fine. But there are some issues I have with it that would not make it a great fit in my system and also costs a bit much. I also have on my short list the Aesthetix Calypso Eclipse and Ayre KX-5 twenty. Can anyone chime in with their experiences? any advice is appreciated. (my pwr amp is CJ Premiere 12 monos). TIA