The SMC revisions, as Steve M explained to me, do not change the basic character of the amp. The overall sound remains similar, but tweaked in such a way to provide more fine detail. Do not expect a radical change. After hearing about my system, he advised getting a better preamp before upgrading my DNA 0.5 Deluxe. Gotta give him credit for not putting on the hard sell. Of course, people are saying such great things about the Rev. A that I'm sure I'll get it done eventually.
