It has long been part of my audio faith tradition to never tell anyone what they are going to, or are capable of hearing. That is in part why my responses are sometimes possibly not understood or appreciated if one does not consider the position I speak from.
That said, you will hopefully understand that I cannot tell if you will notice a difference from the ES series to the Aida you currently have. I have a customer who has bought much from me (Strain Gauge and more) who insists that I am the absolute worst salesman in the world. I am not sure if he appreciates that I take that as a compliment. It’s sort of like feeling good about failing the test to become an insurance salesman. That said, I pray you are NOT an insurance salesman or I have lost you forever or longer.
Do we rebuild from one design into the other? No - too many changes. Too much to do to "convert". If you love your Aida, enjoy it. And then get it fully rebuilt by me for 20% when it wears out or breaks.
What is MY personal philosophy (not for everyone) when I find something I enjoy, whether it’s an audio design, dinner dessert or woman? Don’t look around too much. It runs the risk of taking the joy out of what you hold in your hand.
Peter Ledermann