BB 47 flops two pair on L1...your move?

[pokerlaw]

Comments on the flop play appreciated as well...

Ultimate Bet No-Limit Hold'em Tourney, Big Blind is t20 (10 handed) converter

SB (t1515)
Hero (t1500)
UTG (t1425)
UTG+1 (t1790)
UTG+2 (t1500)
MP1 (t1500)
MP2 (t1490)
MP3 (t1230)
CO (t1590)
Button (t1460)

Preflop: Hero is BB with 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img].
UTG+1 calls t20, <font color="#666666">5 folds</font>, Button calls t20, SB completes, Hero checks.

Flop: (t80) T[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets t70</font>, UTG+1 calls t70, Button calls t70, SB calls t70.

Turn: (t360) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets t360</font>, Hero...?