AK vs. aggro

[orange]

villan is aggro. He is on several of my tables, and runs like 25/20/4 and he and I have played alot of PF battles but rarely taking a flop. He 3-bets light as do I, and I have 4-bet a few times as well (he has done it once).

My plan was to c/f the turn typically. Do you bet this river, hoping to get some value vs. a Q? Or is this a c/c?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Stack sizes:
UTG: $384
orange: $505.55
CO: $219.30
Button: $275.55
SB: $147.55
BB: $200

Pre-flop: (6 players) orange is UTG+1 with A[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img]
UTG calls, <font color="#cc0000">orange raises to $9</font>, CO folds, Button calls, 2 folds, UTG calls.

Flop: Q[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] ($30, 3 players)
UTG checks, <font color="#cc0000">orange bets $20</font>, Button calls, UTG folds.

Turn: 8[img]/images/graemlins/club.gif[/img] ($70, 2 players)
orange checks, Button checks.

River: K[img]/images/graemlins/spade.gif[/img] ($70, 2 players)
orange ?

Converter screwed up a bit. River bet or check?