Pboutin,
I have another suggestion for you:-
deHavilland Aries 845 monoblock. Here's the link:
http://www.dehavillandhifi.com/aries845.htm
It's not a 300B or 2A3 design but I've heard the Cary 805C Anniv edition mono blocks (that use 845 tubes) & they sound better than their 300B SET, of course, to my ears. The intimacy is slightly reduced vs. their 300B design but the authority in bass, transparency & air around voices & instruments is much better IMHO.
I have another suggestion for you:-
deHavilland Aries 845 monoblock. Here's the link:
http://www.dehavillandhifi.com/aries845.htm
It's not a 300B or 2A3 design but I've heard the Cary 805C Anniv edition mono blocks (that use 845 tubes) & they sound better than their 300B SET, of course, to my ears. The intimacy is slightly reduced vs. their 300B design but the authority in bass, transparency & air around voices & instruments is much better IMHO.