Top Ten Tube PreAmp of all time?

This thread for you tubeguys.Nominate your favorite tube Pre Amp of all time. More info for audiogon members the better. Remember some members are just starting their high end experience.
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I've only owned two tube preamps, so I am not really qualified on this subject, but one of mine is the Cary SLP 05 and I like it a lot.  I own a bunch of different tubes for rolling on this unit, and certain tubes make me like it more than others do.

balanced - the best audio research model you can afford

single ended - the best conrad johnson you can afford

keep life simple

just like subwoofers, buy a pair of rels, be done

outstanding products, superb sound, continuing support, durable company, products, people, customer care over generations of products and customers