Ok, based on OJ's chart, I have nothing to do... I think the ultimate chart would be one that provides a suggested path (as this does) but considering the DAC and the amp e.g. Yggy->KGSShv-> SR 009. It would be complicated given the permutations and combinations but fun as hell.
Add: I have the HD 800 with Anax 2.0; just waiting for the EC amps