Too aggresive on turn? - Need feedback on hand

[DVC Calif]

Busted out way early in a Party 20+2 MTT yesterday. No read on villain to tell if he was slow playing or chasing. I was worried more about the spade flush and pushed the turn to make him pay to draw. I completely overlooked the possibility of Broadway showing but can't believe villain would call without any spades.

How should I have bet this and when should I have laid it down? I appreciate all feedback.

Thanks, Steve

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed)

UTG+2 (t565)
MP1 (t1535)
MP2 (t2050)
Hero (t1120)
CO (t960)
Button (t830)
SB (t2175)
BB (t1135)
UTG (t870)
UTG+1 (t810)

Preflop: Hero is MP3 with Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG folds, UTG+1 folds, UTG+2 folds, MP1 folds, MP2 calls t15, <font color="CC3333">Hero raises to t45</font>, CO folds, Button folds, SB folds, BB folds, MP2 calls t30.

Flop: (t115) 8[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players)</font>
MP2 checks, <font color="CC3333">Hero bets t120</font>, MP2 calls t120.

Turn: (t355) K[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players)</font>
MP2 checks, <font color="CC3333">Hero bets t955 (All-In)</font>, MP2 calls t955.

River: (t2265) 2[img]/images/graemlins/heart.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

Final Pot: t2265
<font color="green">Main Pot: t2265 (t2265), between MP2 and Hero.</font> &gt; <font color="white">Pot won by MP2 (t2265).</font>

Results in white below: <font color="white">
MP2 has Jh Td (straight, ace high).
Hero has Qd Ah (two pair, aces and queens).
Outcome: MP2 wins t2265. </font>