Garymd,
711's sytem sounds very good. I had never heard or seen Cornwalls before (but I've seen them discussed favorably on Audiogon) and therefore I was pleasantly surpised by the sound. I must tell you however that 711 has had these speakers modded to the tune of about $1,200 so they are not OEM anymore.
My impressions: Dynamic as hell, easy to drive, play loud and the hoarn loaded tweeter doesn't miss any frequencies including those heard by dogs! Also very good bass response and mid-range but the tweeters and dynamics are definitely the strong points. The Center fill imaging was also very impressive. They are definitely full sounding even though they are not shaped like a traditional floor-stander (they are wide like a rectange but maybe only 25 inches tall. Some of the bass drum and low end orchestral sounds we were getting were phenomenal. Mfg's love to exaggerate the low end response of their speakers but I would say these can get down to a realistic 30 HZ at a reasonable volume before starting to roll off.
Regarding the VRD tubed power amps, I had never heard those either. But what was amazing to me was even though we were using a tubed cd player and tube amps the sound was never overyly warm or syrupy, there was plenty of dynamics and the system cranked out some very high db's without a hiccup or any sense of strain. Plus transparency was very good, which I believe to be a function of both the cd player and the amp.
Mid-range clarity was also a strong point and that is where I think they really excelled. I felt there were times where the bass control could have been a little tighter. It was good but didn't put a "chokehold" (in terms of control) on the bass like some of the Krell or Levension amps I've heard.
711 does not have an ideal room configuration which makes the sound we heard even more amazing. I'm sure 711 can fill you in on better details than I.
AVGURU