Opportunity to buy the best Preamp... but which?

You should consider the Audio Horizons TP 2.0,check out the threads in the discussion forum.You may want to think twice about Calloways recommendation in light of those comments.
You have nothing to lose with a free 30 day home trial.

You should go to www.H-Cat.com, website of North American Products and check out the P12R preamp. You should really try to audition this preamp before you drop big bucks on another preamp. How does it sound? Like the Real Thing. MUSIC. Doesn't cost you anything to try it.

I think the guy's asking about "the best preamp" rather than "my preamp":)

In this light, I suggest you consider: for tubes the Art (which you referenced), the big Aesthetics, and perhaps a CAT.

In SS, the FM acoustics. Maybe the MBL or the Burmester...

I had the ref 2mkII and ref 3..I own the 202 Krell now. When used with the 402 amp in balanced mode, it is just about flawless...almost like being in Boston symphony hall!

Messenger all tube preamp. Yes, I own it and love it. The Messenger is a legendary piece and has taken best of the show honors at CES in 2004, 2005 and 2006. Nuff said.