I shoot D3200 at 1000-1250 with Pyrocat HD. Anything faster gets me impenetrable shadows, but I can push for highlight density. I only get about 800-1000 with Rodinal using semi-stand, 640-800 with PMK.

D76 is the devil, so can't tell you there, I just know that I hate blocked up highlights and don't get them with compensating development regimes.