Amp Recommendations for AZ Crescendo


I have a pair of Crescendos on their way to me and am seeking recommendations for a synergistic tube amp, especially for a larger room (18x30). I have a Modwright KWA 150SE, so am set with SS. Thanks.
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The Crescendo's are very efficient; I'm using a Vac 160i Integrated tube amp rated at 85 watts...
EJay-

both Modwright and Jeff Rowland are sonic matches for your speakers. What other gear, including cables/cords are in your system ? Happy Listening!
Anyone tried Crescendos with Nelson Pass's First Watt Amp?
I am considering mating them with either J2 or F6 amp instead of SET tube amps mentioned in the previous post.  
Your opinion is highly appreciated!!!