I don't disagree with your choice itself, but wouldn't that lead to a white peace rather than a Delian/Athenian success?
Spartans proposed to give Decelea to Athenians, being something they would have to give up in any real peace offer, giving the threat it represented for Attica.
The whole Sicilian Expedition was particularly...half-hassed doesn't cover it : wishful thinking, bad leadership. More you look at it, more you want to call it Trierelion. The result was an awful lot of hoplites, light troops and ships being lost for Athenes and its allies/clients, and political turmoil at home.
Sparing Athens this farcical campaign, either at the benefit of non-intervention, either in a less important but less divided expedition, would really really help the city face Sparta in the second part of the war.
Of course, in any case of victory presented there, you'd always have the risk of a third part of Pelopponesian War that would have an hard time being over without one of both hegemonies being crushed hard enough to no represent a threat anymore for the other. Peace of 406, or stronger Athens in 410's wouldn't likely give a lasting peace.