Big Hand late in tournament- Call or Fold

[BillFranklin]

STT down to 4 players.
Hero (Button) 8,000
SB 3,200
BB 4,500
EP 4,000

Blinds are 200/400 when the following hand occurs. Hero raises 1,200 on the button first in with KQs. SB pushes all in for 3,200 (additional 2,000) BB folds, back to hero to decide.
Your getting about 2.6 to 1 pot odds and the SB is someone you've played with often and have a decent read on. SB is most likely pushing with Ax or Medium pair.

Reasons for calling:
-If BB has Ax or PP (which your sure he has) your getting good pot odds. (+EV)
-Winning this pot will give you huge nearly unbeatable stack.
-If you lose you'll still have a decent stack.

Reason's for folding:
-If SB has AK, AQ, AA, KK or QQ your dead and definately not getting the right price. (-ev)
-Your risking about 30% of your remaining stack (2000/6800)
-All 4 players will be close in chips and the SB will actually become the chip leader.

thoughts?