deep into party 40k, decision vs big stack

[chio]

party 40k gtd ($109)
749 players, ~180 left

i've been playing pretty tight, and just showed down 88 vs an AK all-in for a 6k pot. no read on villian except that he hasn't gotten out of line and has folded to my SB steal raise once.

i have ~14k in the SB, villian has the same in the BB (avg stack is ~8k)

blinds are 200-400
fold to me in SB with K [img]/images/graemlins/diamond.gif[/img]J [img]/images/graemlins/diamond.gif[/img], i raise to 800, villian calls

flop is 2 [img]/images/graemlins/spade.gif[/img]7 [img]/images/graemlins/diamond.gif[/img]9 [img]/images/graemlins/diamond.gif[/img]
i bet 1000 into 1600 pot, villian min-raises to 2000. your move?