TPTK facing pressure on a monotone flop

[student_of_game]

NL400, 6-handed

Effective stacks: $290.

Villain is new to table, this being his third hand at the table, and I haven't seen him do anything much.

Preflop: UTG folds. UTG+1 just joined and posted; he checks. I raise to $20 in the cut-off with A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img]. Villain on the button makes it $70. Folds to me and I call.

Flop (2 players, $150): Q[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img]
Villain pots it. I ??

Also, comments on the pre-flop play appreciated. While I am willing to four-bet to keep opponents in line if I am getting three bet a little too often, I generally like to keep the pot small preflop against unknowns.