[rbear]

In a STT early, I'd much rather call for cheap w/ AQo in position, than 3x a pot with such a vulnerable hand. We don't know that tight player will reraise, just as likely tight passive, as tight aggressive.

What happens when both players stay in? Now you have 500 in the middle, and any continuation bet will have to be significant to take the pot down (you'll have more than 1/3 your stack in the middle, if you choose this route). Keep the pot small by cold calling, see a flop, and go from there.
Say an ace comes, and your read is correct that donk has Ax. Donk bets, tight folds w/ no AK, and you stack em. Why risk more than you have to. Additionally, a continuation bet on this flop would be ~100, where it's much bigger if you bump it up so much.