First hand of $30 Party MTT

[Chaostracize]

A [img]/images/graemlins/diamond.gif[/img] Q [img]/images/graemlins/club.gif[/img] on the button. UTG and MP1 limps. Call here?

I raise to 45. SB, BB, UTG, and MP call. 225 in the pot.

Flop comes Q [img]/images/graemlins/heart.gif[/img] 8 [img]/images/graemlins/heart.gif[/img] 5 [img]/images/graemlins/heart.gif[/img].

Check to me, and I bet 175.

SB calls, rest fold.

Turn comes 6 [img]/images/graemlins/club.gif[/img].

SB checks, and I bet 255 into the 575 pot. SB calls.

River comes 8 [img]/images/graemlins/diamond.gif[/img]. SB bets 125. I call.

What's the 'right' way to play this hand?