Maximum extraction in huge pot

[rvg72]

All of the villains are semi-tight, semi-aggressive but nothing that stood out. How would you play this differently to extract the most amount of money? I explained my reasoning at each street - feel free to comment.

Party Poker 5/10 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is SB with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#CC3333">UTG+2 raises</font>, <font color="#666666">1 fold</font>, MP2 calls, <font color="#666666">1 fold</font>, CO calls, <font color="#666666">1 fold</font>, Hero calls, <font color="#666666">1 fold</font>, UTG+1 calls.

Flop: (11 SB) 5[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
Hero checks, UTG+1 checks, <font color="#CC3333">UTG+2 bets</font>, MP2 calls, <font color="#CC3333">CO raises</font>, Hero calls, UTG+1 folds, UTG+2 calls, MP2 calls.

I like my call here - it didn't keep the UTG+1 in it but I think a raise knocks out UTG+2 and MP2 often enough and I want them all in this pot.

Turn: (9.50 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, UTG+2 checks, <font color="#CC3333">MP2 bets</font>, <font color="#CC3333">CO raises</font>, Hero calls, UTG+2 calls, MP2 calls.

Well I have close to the nuts... only thing I'm worried about at this point is a King on the river and a guy holding AK. I want to give UTG+2 a chance to call this and MP+2 a chance to raise.

River: (17.50 BB) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>

I think this is the perfect river card. Now we likely are up against a flush and a set of aces or lower full house. What do I do here?

Final Pot: 17.50 BB