Screw it man...Get a loan...get the Yggy and the ZDS (i'll spare you the Studio....). Mod the HD 800....and enjaaai (as we Tamilians say)....
Any suggestions for a non-schiit amp?- Main job will be for HD650, HE400S, TH900. Preferably with UERM. In the future, maybe also with W1000x- Budget under 400 CAD (1USD~=1.35CAD these days)- Preferably tube- Small footprint is a plus- Preferably amp only
Did you check out Garage1217? Solderdude can help you with this directly.