Preamp choice: CJ vs CAT vs First Sound vs ...

I'm looking at moving on from my beloved Audible Illusions M3A. Would you please post your experiences listening to or comparing the following preamps:

- Conrad Johnson LS 17, 16, 16 mkII
- CAT Ultimate, CAT Sig III
- First Sound
- others of distinction (Joule?...)

Please note what power cord you used. I've found that power cords have a night & day effect on preamps in particular.

I've had the First Sound on long term loan in my home and consider it FANTASTIC, expecially with the new Shunyata Taipan powercord. It's a bit softer and warmer with the Black Mamba. (on the first point all present agreed; on the second there was some dissention)

Thanks,
Art