Insofar as this discussion seems to focus on the engineering aspect of the Eidolon Diamond, you should at least be aware of the facts. In addition to the diamond tweeter, there are a new woofer (with the same cone diameter), new internal wiring and crossover. The cabinet and midrange driver are the same but everything else is different. With all these changes, it stands to reason that there should be a significant difference in performance. It is also my opinion that the higher end Avalon products (which is what I am most familiar with) do offer reasonable performance for the money. Examine the cost of the components, particularly drivers, and you'll see what I mean.
