2-5 NL hand Bellagio

[walsh313]

Just sat down to 2-5 NL(200min-500max) at bellagio. Somewhat loose passive, good game. Avereage stack around 400-500. Two bigger stacks, one 900, and villian about 1500. Villian in sb, Hero in mp. Dealt AK, one limp, two folds, Hero raises to $25 with AKo. Hijack calls, button calls, villian repops to $125. Hero calls, other two fold. Flop comes A 8 3 rainbow. Villian checks, Hero bets $150, Villian check raises to $450. Hero????