3/6NL - QQ overpair and flush draw facing large allin

[omikron]

I'm new to the table and stats say Villian is 23/15 in a little over 300 hands. I don't recognise him. FWIW in this small sample he has C/R flop 2/27 times and raised a C-bet 4/16 times.

He tanked calling preflop.

Full Tilt No-Limit Hold'em, $6 BB (6 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver Cards)

UTG ($631.05)
Hero ($621)
CO ($569)
Button ($228)
SB ($678.30)
BB ($813.10)

Preflop: Hero is MP with , .
UTG raises to $15</font>, Hero raises to $54</font>, 4 folds</font>, UTG calls $39.

Flop: ($117) , , (2 players)</font>
UTG checks, Hero bets $78</font>, UTG raises to $577.05 (All-In)</font>