mmporsche,
Wow! Switching from the constellations to the 211 tube integrated is quite a leap across the amplification spectrum. I suspect your current system sounds marvelous.
bigwave1,
I understand your point regarding the advantages of higher efficiency/sensitive speakers (My preference as well). However the OP (Dave) is happy with his Revels. So I believe most suggestions to him are provided with that in mind (Keeping the current speakers),
Charles