In terms of the AD/DA quality in the H8000FW, noodle1 is probably right. To be more precise, the converters in the H9000 are very good, but there is no gain staging. People have been asking for another extension card – that would make sense.
But definitely yes, keeping the Eclipse is a good idea if you don’t need the money to invest it elsewhere. In these times, it’s extremely unlikely that any of these units will drop in price anywhen soon – so let’s consider the Eventides to be a kind of “electronic gold” 🙂