There is a good interview with Rein Narma and a joke made regarding people "complaining" about the authenticity of such "retro" aspects of the device he would probably change using current modern technology. retro doesnt always mean better, smart people always appreciate the new I suppose.
If the change is for the sound to be better and experienced peoples are saying so it must be worth changing.
Seeing as you mentioned izotope. Some huge latency with there vst plugins, I dont mind using them in a wave editor but tracking they require a powerfull computer.