10/20 deepish top 2 in 3bet pot

[skier_5]

Villian is nemuii, who is a reg who is pretty spewy and not particularly great. We have tangled a bit in the past and I've mostly come out ahead since he likes to make thin calls (and bets) with marginal hands. He likely views me as fairly taggish.

PokerStars No-Limit Hold'em, $20 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($1988)
UTG ($2339.50)
Button ($3771)
Hero ($3632)

Preflop: Hero is SB with Q[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to $60</font>, <font color="#CC3333">Hero raises to $255</font>, <font color="#666666">1 fold</font>, Button calls $195.

Flop: ($530) Q[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $340</font>, Button calls $340.

Turn: ($1210) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $750</font>, <font color="#CC3333">Button raises to $1500</font>

How's my line up to here? what's my play now?