Good spot to c/r the river or bet out?

[redrooski24]

I think this has been a missing key to my NL cash game, and that is c/ring the river when I think my opponent will bet a strong hand that I have beat and I'll get him pot stuck into calling. Read on villain is that he is pretty tight, I definitely think he might get cute and check this flop with AK AQ, maybe even KK, which is pretty much all I could put him on with his PFR(also JJ and QQ). Overall pretty solid however, no stats on him but he was on 2 of my tables at the time and hasn't done anything crazy. Oh how I love free cards [img]/images/graemlins/laugh.gif[/img]. Also, does anyone overbet the river in hopes of getting more out of AQ/AK if that is what villain has?

PokerStars No-Limit Hold'em, $2 BB (9 handed) FTR converter on zerodivide.cx

BB ($263.10)
UTG ($27)
UTG+1 ($73.10)
MP1 ($63)
MP2 ($179.25)
Hero ($267.20)
CO ($413.40)
Button ($87.60)
SB ($104.10)

Preflop: Hero is MP3 with 4[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls $2, <font color="#666666">2 folds</font>, Hero calls $2, <font color="#CC3333">CO raises to $10</font>, <font color="#666666">3 folds</font>, UTG+1 folds, Hero calls $8.

Flop: ($25) 6[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, CO checks.

Turn: ($25) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, CO calls $18.

River: ($61) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $40</font>, CO calls $40.

Final Pot: $141