Have you read about their even newer chips, the ES9012 and ES9018? (These two new ones both have the same specs apparently, I think one is just made somewhere else.)
These babies have even higher specs and better jitter correction than the ES9008, from what I can tell.
ismosys.com
But I guess you have to wonder at what point is something overkill. The new HR UltraDAC sounds like a winner.
Tyll, does it have discrete output or is it op-amp based?