Which Preamp would match my system?

Rogue Magnum 99 got many great review at audioreview, and it's fairly priced.

Of the few pre's I've tried with a Passion, I particularly enjoyed the Passion & the CAT Ultimate -- both of these are expensive, as you note. I also liked a Symphonic Line -- but that's even more expensive...

From there it's pure speculation; the Passion stereo is an easy load, so the choice is huge. It's also an exquisite amplifier with excellent resolution. So, using a "good" pre (as opposed to an "outstanding" pre) will be audible.
Have you thought of going passive? A transformer volume control can offer excellent results, and you have lots of power in the Passion and reasonably efficient speakers -- so maybe you can live without the extra db's a pre will offer.

Would vouch for a high quality tubed preamp such as First Sound Presence or a Bat, with the super tubes. Honestly, for the type of system I personally feel that the Rogue would bring the level down a notch. There are some Rogue users out there but I have read that their tubes need to be closely matched or else, you might wind up with some noise issues. A hot rodded First Sound Presence Deluxe II, with a single input and direct heating of the source with the tube...would not that sound spectacular with your highly revealing source. Talk to Emmanuel, he is a great person to discuss the needs. For world class set ups such as yours, why settle for anything iffy or less than the best?