S23Chang..your right on the money with the McIntosh MC40's, thats why I sold them awhile ago. Regarding the EV's, I do have some vintage Ainico McIntosh supertweeters coming to me(a friend built some special stands for them) to go on top of the EV's.. I also agree about the cabs (just havent found anyone to make them) I do have a pair of TL's that were designed for Lambda Acoustic subs, maybe i will try the EV's in them...
I now use only the Berning EA-230 triodes, which I absolutely love, and I havent listened to the AR preamp you mentioned, but the amp-preamp setup is working very well as it is.
maybe I will invest in some cabs for the EV's,,