Pretty deep $200NL, bottom set

[AcesUp2121]

Good table, me and the two villains involved have over $550 apiece, with me covering both. BB appears solid, and has reraised other villain preflop multiple times, once showing down 6s. Other villain is a bit of a donk, and pays off too much.

The hand:
I limp UTG with 4 [img]/images/graemlins/spade.gif[/img] 4 [img]/images/graemlins/heart.gif[/img]. Few more limpers, Villain in cutoff makes it $6 to go, folds to the big blind who makes it $15 straight. We're pretty deep so I call. Everyone else folds.

Flop: 9 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/diamond.gif[/img]
Checks around (bleh?)

Turn: A [img]/images/graemlins/club.gif[/img]
Checks to me, I bet $30, both Villains call.

River: A [img]/images/graemlins/heart.gif[/img]
Checked to me, I bet $80, Villain goes to $200, BB shoves for $450 or so, Hero pukes and...