How high a flush do I need to call this? ($2/2 protected sidepot)

[wazz]

UTG is strong, loose-aggro. No significant read on shortstack but I consider it likely he has aces. How does my decision change if I have two pair/set with it? Please (for now) ignore my preflop and flop FPS.

Poker Room skin
Pot Limit Omaha Ring game
Blinds: $2/$2
5 players
Converter

Stack sizes:
UTG: $254.45
CO: $93.80
Button: $173
hero: $571.65
BB: $86

Pre-flop: (5 players) hero is SB with XXXX
<font color="#cc0000">UTG raises to $8</font>, CO calls, Button folds, <font color="#cc0000">hero raises to $12</font>, BB folds, UTG calls, <font color="#cc0000">CO raises to $58</font>, hero calls, UTG calls.

Flop: 7[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img] ($176, 3 players)
<font color="#cc0000">hero bets $13</font>, UTG calls, <font color="#cc0000">CO raises all-in $35.8</font>, hero calls, UTG calls.

Turn: Q[img]/images/graemlins/heart.gif[/img] ($283.4, 2 players + 1 all-in - Main pot: $283.4)
<font color="#cc0000">hero bets $50</font>, <font color="#cc0000">UTG raises all-in $160.65</font>, hero calls.

River: 5[img]/images/graemlins/heart.gif[/img] ($604.7, 1 player + 2 all-in - Main pot: $283.4, Sidepot 1: $321.3)

Results:
Final pot: $604.7