double barrel

[lead24]

BB: $71.60
UTG: $153.75
CO: $50
Hero (BTN): $43.60
SB: $76.85

Pre-Flop: 7[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/heart.gif[/img] dealt to Hero (BTN)
UTG calls $0.50, CO folds, Hero calls $0.50, SB calls $0.25, BB checks

Flop: ($2) T[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] (4 Players)
<font color="red">SB bets $1.50</font>, 2 folds, <font color="red">Hero raises to $6</font>, SB calls $4.50

Turn: ($14) 5[img]/images/graemlins/club.gif[/img] (2 Players)

no stats
i usually take the free card. but i was wondering if double barreling this is a better idea.