Which of these 4 Phono Pre you'dl choose?

Hi to all the forum members,

I'm looking for a new phono preamp to upgrade my system. The only one that I had was the first version of ASR MiniBasis, a very good preamp, but compared to the settings and the improvements of the Exclusive model the first version it's so far behind. I have watched, but no listened, other three more expensive models (at least here in Spain) but I don't have sound reference. I would like if you can give me an opinion of these models:

- ASR MiniBasis Exclusive
- LehmannAudio Decade
- Avid Pulsus
- Nagra BPS

All are factory new and their prices range from $1500 (MiniBasis) to $2300 (Nagra)

Please tell me your reviews!

Thanks in advance