Stars $4 180 - Turn decision with top 2 pair

[True North]

Early in a $4+$.40. MP1 has been at the table for about one orbit, and showed severe calling station tendencies in the one hand he played. CO seems average.

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP1 (t3845)
MP2 (t1685)
MP3 (t2580)
CO (t3940)
Button (t7145)
SB (t2500)
Hero (t3950)
UTG (t3629)
UTG+1 (t2375)

Preflop: Hero is BB with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls t50, <font color="#666666">2 folds</font>, CO calls t50, <font color="#666666">2 folds</font>, Hero checks.

Flop: (t175) Q[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP1 checks, <font color="#CC3333">CO bets t100</font>, <font color="#CC3333">Hero raises to t400</font>, MP1 calls t400, CO folds.

Turn: (t1075) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t600</font>, <font color="#CC3333">MP1 raises to t1500</font>, Hero ???

Two questions:

1) Was my play all right before and on the flop? I checked the BB to avoid building a big pot OOP. I was torn between leading out with a pot-size bet and checking to CR on the flop.
2) Fold, call or raise the turn?