Frank, question for you: having listened to both the WA5 and the Mono 234, how would they compare SQ wise given equal tubes (e.g. 6SN7/ 300B)? I'm wondering if the Mono 234, for the price premium, is just giving output tube options.
I would recommend something along the lines of the Brimar (England) manufacture: http://www.ebay.com/itm/2-NIB-GE-6V4-EZ80-Tubes-UK-Brimar-d-getter-/141181664297?pt=Vintage_Electronics_R2&hash=item20df153c29 I have three to four sets of NIB Brimar EZ 80's tubes. It's currently the only rectifier tube I'll run in my WA-2. I don't know the seller on ebay but at $40 it's a good deal IMHO.