monster draw, turned A

[kura0]

PartyPoker $400 NL Hold'em <font color="#0000FF">(5 handed)</font> HandRecorder v0.9b

Stacks &amp; Stats
MP ($450) (38/15/1.72/26) (1700h)
CO ($394)
SB ($405.80)
BU ($392)
Hero ($788.47)

Preflop: Hero is BB with 4[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/diamond.gif[/img]
<font color="#FF0000">MP raises to $8</font>, <font color="#666666">2 folds</font>, SB calls $6, Hero calls $4.

Flop: ($24) 5[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#FF0000">Hero bets $20</font>, MP calls $20, SB folds.

Turn: ($64) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#FF0000">MP bets $55</font>, <font color="#FF0000">Hero ?</font>

Final Pot:

whats your line here?