Preflop: Hero is BB with A, A. 2 folds, MP1 raises to $0.75, MP2 calls $0.75, MP3 folds, CO calls $0.75, BU calls $0.75, SB folds, Hero raises to $3.40, 3 folds, BU calls $2.65.
Both options are fine, even if you Bet the turn then I doubt that it changes much. He ain't most likely bluffing the river anyways, meanwhile might get scared if another arrives.