Do you know this Preamps?

Hi friends,

I would like to have your opinions about 4 phono preamps. I have one ASR MiniBasis MKI but I would like to upgrade to a one of these:

1) ASR MiniBasis Exclusive
2) LehmannAudio Decade
3) Avid Pulsus
3) Nagra BPS

The price (new) that I have starts from $1480 of the MiniBasis to $2250 of the Nagra BPS.

Please give me your review if you have tried one of these!