tptk 3bet pot oop river situation

[DirteAA]

Villain is CS_Sitz on FTP. I have him at 27/13/2.5 over 30k hands. We were on several tables together, he was defending his blinds frequently and trying to float me in position. I had not 3-bet him prior to this on any table and he had only seen me show down strong hands.

Is the river an easy bet/call situation? Bet ~70 and call a shove? Shove? I feel kinda lost b/c I don't think he calls with much of anything that I beat.

He has $132 left on the river.

Full Tilt Poker - No Limit Hold'em Cash Game - $1/$2 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $201.00
Hero (BB): $268.65
UTG: $206.15
MP: $200.00
CO: $246.40
BTN: $465.90

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] (6 Players)
UTG folds, <font color="red">MP raises to $8.00</font>, 3 folds, <font color="red">Hero raises to $28.00</font>, MP calls $20.00

Flop: ($57) A[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, MP checks

Turn: ($57) 8[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $40.00</font>, MP calls $40.00

River: ($137) Q[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero