Jadis JA30 Mk2, how great???

+1000 Charles.

I have never really considered measurements as any kind of arbiter regarding the SQ of audio gear. My ears are the arbiter, just like yours. The measurement crowd tends to shy away from this...which is fine, but i never understood how they correlated what they look for in the measurement and what some "expert" has determined that the measurement correlates to in the sounds that we hear. ( Remembering that what you hear, I hear- and they hear, are probably variations that we all interpret differently). 
Not to say that the new Jadis amps won't measure well, we have no idea about this ( and they very well could measure great)...but like you said, tube amps don't typically do this. 
BTW, I was looking at the graph showing the frequency and linearity result that was presented with my speakers....Jeez these guys are almost ruler flat from 45Hz to over 18Khz!! So somebody at SF did have great ears and the ability to design for flat response and measurement!  
Franco really is missed!!!

I know 2 people who have have the amp, preamp.   They've both had lots of issues with them.   When they work, they sound good...but.....

stringreen, what vintage are the friends gear? Are you referring to JA 30's or some other model in the line up? I would very much doubt that the amps you are referring to are the new mk 2 models. As to the preamp, I have no experience with Jadis models.... no need to, as my CAT is a perfect match for the Jadis amps. 

Davey:
I want to be clear the air about me raving about the JA 30ll and then selling them to Davey and now hearing his opinion.
I loved the Jadis elegant sound as well and I think you are finding my description as I posted accurate.
I sold the amps. with regret but they simply were not enough power for my Gamut RS7i speakers and the marriage broke up.....the mate was my fault but certainly the dealer as well. I now say what was I thinking and certainly was not the amps. fault.  These speakers really like a "bigger amp." and the JA 80ll would have been a better match but they were out of my range. I am thrilled Davey is "engaged" in the music. 
With a brief trial with a refined SS amplifier, I have landed a deal on a CAT JL5 amplifier and just got it home today. It is a way better mate for these speakers and CAT can pretty much do it all. 
Once again it is all about proper mates. I am one of those guys that believe you mate the amplifier to the speaker.....not the other way around. 
Gwalt

Gary, great news...I was expecting that you would really like the CAT JL5. I am sure that this amp will be a great match to your Gamut's. Like you said, you match the amp to the speaker...and not the speaker to the amp. CAT is such a great piece of gear...as you know, I am a very BIG fan.
Oh, only drawback is now you have to think about the CAT preamp...;0)
Daveyf