Not nut flush - How would you play this hand?

[PaulMTC]

Interested to know how you would have played this hand.

Villain was solid player.

Cryptologic
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $111.75
UTG+1: $51
CO: $30
Button: $70.28
SB: $172.75
Hero: $120.50

Pre-flop: (6 players) Hero is BB with 5[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img]
UTG folds, UTG+1 calls, CO folds, <font color="#cc0000">Button raises to $3</font>, SB calls, Hero calls, UTG+1 calls.

Flop: 7[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/spade.gif[/img] ($12, 4 players)
SB checks, <font color="#cc0000">Hero bets $10</font>, 2 folds, SB calls.

Turn: K[img]/images/graemlins/diamond.gif[/img] ($32, 2 players)
SB checks, <font color="#cc0000">Hero bets $30</font>, SB calls.

River: 4[img]/images/graemlins/heart.gif[/img] ($92, 2 players)
<font color="#cc0000">SB bets $29.75</font>

Hero ?????