50NL: I slowplay a monster...ugly?

[Lurker.]

this guys like 34/14/4 over a decent sample. My reads on him are that he's a habitual floater, and the hand before this one he took down a pot by floating my cbet (unless he had an actual hand, which is possible i guess). So...thoughts? Betting the river is better? If so, why?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $62.50
BB: $50.00
UTG: $15.50
Hero (MP): $51.00
CO: $57.35
BTN: $12.20

Preflop: Hero is dealt T[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG calls $0.50, <font color="red">Hero raises to $2.25</font>, CO calls $2.25, 3 folds, UTG calls $1.75

Flop: ($7.50) T[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (3 Players)
UTG checks, <font color="red">Hero bets $5.00</font>, CO calls $5.00, UTG folds

Turn: ($17.50) K[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, CO checks

River: ($17.50) T[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks