Keep in mind that the Rogue will not keep its value very well over the years but a comparison side by side would be a good indicator of sound quality - remember many companies are trying their best to duplicate the sound of those 30's in their new equipment.
Rogue Audio or Mcintosh
I have a pair of classic McIntosh MC30 monoblocks with NOS GE tubes, Rogue Audio 66 preamp with Magnum upgrade, Denon DCD1650AR cdp and Spendor SP100 speakers. The MC30's are exceptionally clean and very cool but I am sure a fair amount of technilogical improvements in amplification have been made over the 40 years since the MC30's were made and am considering replacing them with the Rogue Audio 88 power amp. Any thoughts?