400nl: pretty standard TPGK oop hand

[w33ktight]

400nl on wpx. 6 handed. I just sat down and have no history with villain. 100bb stacks. nothing else to note besides the fact that Ive never seen this player before. on WPX, this means there is a good chance its a bad player.

the button and co both limp, sb limps, I bump it to 30 from the bb w/ K[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]

button calls. flop is Q[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img]

I cbet 2/3 pot and get instaminraised. what do you think of this from an unknown, and what is the best play?