i've run 3.5 weeks of SD where i started at 10mg and worked up to 30. The differences between 10, 20, and 30 aren't much at all really, SD is a strong compound where more isn't necessarily better.
That said, i felt good on 30mg, didn't have any lethargy, debilitating back pumps, blood pressure issues, libido issues, nothing, felt great.
everyone's different, won't know until u try