Jadis JA30 Mk2, how great???

butler, all Jadis pieces get silent updates from time to time that improve upon the original design. That would apply to JP80/JPS2 as well. We have used those preamplifiers in variety of full range systems playing heavy rock material with terrific results. Having said that, you might prefer the CAT for rock - it would give you more slam and macro dynamics that you mention In fact, it beats 99% of solid state and ALL tube preamps in that department.  It is also cheaper then JPS2 by a cool 5K in line stage only version. 
When you come to visit, you will have the opportunity to compare several preamps and make your own conclusions. If you wish to talk about it more, please do not hesitate to call me.

I'm familiar with the CAT preamplifier in various iterations as a couple of friends had them through several generations. It's a very good product and has earned a well deserved reputation. Yet I suspect that the Jadis JPS2 is something very special and particularly with a Jadis amplifier. 
Butler I look forward to reading your auditioning lmpressions. 
Charles, 

Thanks George and Charles.......I actually hope the Jadis pre works for me when all is said and done.  What the heck, might be nice to have a matching amp/preamp combination for once, certainly not too shabby looks-wise for sure.  Like gwalt, I will keep everyone posted as it goes.

By the way George, do you recall which pre was used for gwalt's audition of the JA30 amp?

Matching /amp/preamp is always a good idea, I agree. Especially in case of Jadis. That is why I recommended JPS2 in the first place. 

For gwalt's audition of the JA30 MKii we used top of the line 4 chassis JP200MC.