200nl bottom two in multiway vs LAG

[jvans]

flat caller is 23/15/3 seems decent, original raiser is 41/26/3 over dec sample calls a lot preflop and folds to flop bets a lot

Full Tilt No-Limit Hold'em, $2 BB (6 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">CO ($348.90)</font>
<font color="#C00000">Hero ($422.05)</font>
SB ($166)
BB ($238.15)
UTG ($197)
MP ($199.30)

Preflop: Hero is Button with 7[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises to $6</font>, <font color="#CC3333">Hero raises to $21</font>, <font color="#666666">1 fold</font>, BB calls $19, CO calls $15.

Flop: ($64) A[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets $40</font>, <font color="#CC3333">CO raises to $327.9 (All-In)</font>, Hero calls $327.90, BB folds.

Turn: ($0) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

River: ($0) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $759.80
<font color="#009B00">Main Pot: $759.80, between CO and Hero.</font>

im almost certain BB has AK and im beating him, im not really sure what initial raiser has here but given how loose he is i feel like i should call here, thoughts?