AK in the SB, Hero needs a plan

[AceofSpades]

Reads: Big stack has not been raising much, his raise is most likely a raise for value.

I'd like to know who is folding to the preflop reraise, and
once you flop top pair, what is your plan for the rest of the hand?

The actual hand is below.

Stars $20, 180 SNG - 52 left
PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (8 handed) converter

MP1 (t15840)
MP2 (t3605)
CO (t1385)
Button (t3945)
Hero (t10665)
BB (t8232)
UTG (t3900)
UTG+1 (t2975)

Preflop: Hero is SB with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">MP1 raises to t600</font>, <font color="#666666">3 folds</font>, Hero calls t500, <font color="#CC3333">BB raises to t1000</font>, MP1 calls t400, Hero calls t400.

Flop: (t3000) K[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>

Hero checks, BB checks, <font color="#CC3333">MP1 bets t1800</font>, <font color="#CC3333">Hero raises to t4000</font>, BB folds, <font color="#CC3333">MP1 raises to t14840</font>, Hero calls t5665 (All-In).

Turn: (t27505) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: (t27505) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: t27505