Acalex, I just want to say thanks for sharing, it has been great fun and very interesting following your way towards the final decision.
I first found this thread when I searched information about Jadis, then like everytbody else reading I was very curious what you were going to chose in the end. Personally, I have listened to the smaller brother (sister?) of the Jadis familiy, the Orchestra Reference and was stunned! At the moment I have quite difficult speakers for low powered amplifiers (Dynaudio), so I chose to get a 75 watt McIntosh tube amp instead to get a much more controlled bass. The music I'm hearing now is fantastic, but I can't forget the glorious midrange sound of the Jadis that struck me. No matter what we chose, I guess there will always be doubt in mind. I haven't heard the Jadis JA50, I wish I had. I was told it has much more bass control than the Orchestra Reference. Now, I can't help checking the second hand market now and then and see what comes up, maybe there will be a Jadis amp for me also in the end, either a more powerful integrated or mono blocks. Time will tell.
Again, thanks for sharing and good luck in the future with your search for other hifi equipment. Don't forget about us, the readers of this forum, what you come up with or if you have more things to say about your new Jadis. We want to know it all!