400NL - Sickest hand I've played in a while

[willw9]

Villain here is wizalex, running 36/23 over enough hands. He's pretty bad, but competent. Earlier we played this hand:

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 4 Players
LeggoPoker Hand History Converter

BB: $154
UTG: $1,400.70
Hero (BTN): $434.95
SB: $800.75

Pre-Flop: A[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/club.gif[/img] dealt to Hero (BTN)
UTG folds, <font color="red">Hero raises to $14</font>, SB calls $12, BB folds

Flop: ($32) T[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $23.95</font>, SB calls $23.95

Turn: ($79.90) 6[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $62</font>, SB calls $62

River: ($203.90) 7[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $180</font>, SB calls $180

Results: $563.90 Pot ($2 Rake)
Hero showed A[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/club.gif[/img] (a flush, Ace high) and WON $561.90 (+$281.95 NET)
SB mucked 5[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/heart.gif[/img] (a flush, King high) and LOST (-$279.95 NET)

On to the hand:

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

BTN: $219.30
SB: $1,333
Hero (BB): $643
UTG: $134
CO: $524.10

Pre-Flop: Q[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] dealt to Hero (BB)
UTG folds, <font color="red">CO raises to $16</font>, 2 folds, <font color="red">Hero raises to $54</font>, CO calls $38

Flop: ($110) 4[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero checks, CO checks

Probably should've bet the flop here, but he was quite resilient and his fold to cbet % was below 50.

Turn: ($110) Q[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $65</font>, CO calls $65

Valuetowning obv.

River: ($240) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $100</font>, <font color="red">CO raises to $405.10 and is All-In</font>, Hero calls $305.10

I tanked and my timer ran down about 5 seconds after I pressed TIME. I couldn't decide what was the best action here. I ended up making the blocker because of how heroic he was in the first hand. I really didn't expect him to shove. It took him about 6-8 seconds fwiw.

Thoughts?